Researcher Profile and Settings

Master

Affiliation (Master)

• Faculty of Science　Physics　Condensed Matter Physics

Affiliation (Master)

• Faculty of Science　Physics　Condensed Matter Physics

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Profile and Settings

Degree

• Doctor of Science（Okayama university）

Profile and Settings

• Name (Japanese)

  Hidaka

• Name (Kana)

  Hiroyuki

• Name

  201301013476285858

Alternate Names

http://kaken.nii.ac.jp/d/r/90466459.ja.html

Achievement

Research Interests

• 多極子秩序   複合極限（高圧・低温・強磁場）   低励起フォノン   カゴ状化合物   強相関f電子系   

Research Areas

• Natural sciences / Magnetism, superconductivity, and strongly correlated systems

Education

• 1997/03 - 2001/03  Osaka University  School of Engineering Science

Published Papers

• Polarized Neutron Diffraction Study on UPt₂Si₂

  Fusako Kon, Chihiro Tabata, Hiraku Saito, Taro Nakajima, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka

  Journal of the Physical Society of Japan 93 (4) 0031-9015 2024/04/15
• Elemental Dilution Effect on the Elastic Response due to a Quadrupolar Kondo Effect of the Non-Kramers System Y1−xPrxIr2Zn20

  Ruo Hibino, Tatsuya Yanagisawa, Yoshito Mikami, Hiroyuki Hidaka, Hiroshi Amitsuka, Sergei Zherlitsyn, Joachim Wosnitza, Yu Yamane, Takahiro Onimaru

  Journal of the Physical Society of Japan 2023/07/15
• Lattice Instability of UTe₂ Studied by Ultrasonic Measurements

  Keita Ushida, Tatsuya Yanagisawa, Ruo Hibino, Masato Matsuda, Hiroyuki Hidaka, Hiroshi Amitsuka, Georg Knebel, Jacques Flouquet, Dai Aoki

  Proceedings of the 29th International Conference on Low Temperature Physics (LT29) 2023/05/22
• Change in the Ground State of Y_1−xPr_xIr₂Zn₂₀ due to a Quadrupolar Kondo Effect with Pr Concentration x

  Ruo Hibino, Tatsuya Yanagisawa, Yoshito Mikami, Hiroyuki Hidaka, Hiroshi Amitsuka, Sergei Zherlitsyn, Joachim Wosnitza, Yu Yamane, Takahiro Onimaru

  Proceedings of the 29th International Conference on Low Temperature Physics (LT29) 2023/05/22
• Magnetic Field–Temperature Phase Diagram of CeCoSi Constructed on the Basis of Specific Heat, Magnetoresistivity, and Magnetization Measurements: Single Crystal Study

  Hiroyuki Hidaka, Shun Yanagiya, Eikai Hayasaka, Yuma Kaneko, Tatsuya Yanagisawa, Hiroshi Tanida, Hiroshi Amitsuka

  Journal of the Physical Society of Japan 91 (9) 0031-9015 2022/09/15
• Possible Magnetic Structure with a Tilted Helical Plane in SmBe13 Probed by 9Be-NMR Study

  Hiroyuki Hidaka, Yoshihiko Ihara, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 90 (9) 0031-9015 2021/09 [Refereed]
   

  9Be-NMR measurements were performed using single crystalline SmBe13 in order to investigate a magnetic structure of a low-temperature ordering state microscopically. We observed a spectral broadening in the ordered state, and the broadened spectral shape depends on the magnetic field directions. By comparing the experimentally obtained and simulated NMR spectra for magnetic fields along the cubic [001] and [011] directions, we argue a helical structure with a basal plane tilted from the (001) plane in low-field ordering region under the assumption of a helical with a propagation vector of (0, 0, 1/3) found in other RBe13 compounds (R = rare earths). Such a tilted helical structure is explained by a combination of an ellipse helical in the (001) plane and a longitudinal magnetic density wave along the [001] direction. Considering a magnetic easy axis parallel to [001] revealed by the magnetization measurements, the peculiar helical structure in SmBe13 may be built on delicate balance among exchange interactions, dipole-dipole interaction, and singleion magnetic anisotropy due to the crystalline electric field.
• Electric Quadrupolar Contributions in the Magnetic Phases of UNi4 B

  T. Yanagisawa, H. Matsumori, H. Saito, H. Hidaka, H. Amitsuka, S. Nakamura, S. Awaji, D. I. Gorbunov, S. Zherlitsyn, J. Wosnitza, K. Uhlířová, M. Vališka, V. Sechovský

  Physical Review Letters 126 (15) 0031-9007 2021/04 [Refereed]
   

  We present acoustic signatures of the electric quadrupolar degrees of freedom in the honeycomb-layer compound UNi4B. The transverse ultrasonic mode C66 shows softening below 30 K both in the paramagnetic phase and antiferromagnetic phases down to ∼0.33 K. Furthermore, we traced magnetic field-temperature phase diagrams up to 30 T and observed a highly anisotropic elastic response within the honeycomb layer. These observations strongly suggest that Γ6(E2g) electric quadrupolar degrees of freedom in localized 5f2 (J=4) states are playing an important role in the magnetic toroidal dipole order and magnetic-field-induced phases of UNi4B, and evidence some of the U ions remain in the paramagnetic state even if the system undergoes magnetic toroidal ordering.
• Helical magnetic ordering studied in single-crystalline GdBe13

  Hiroyuki Hidaka, Kota Mizuuchi, Eikai Hayasaka, Tatsuya Yanagisawa, Jun Ohara, Hiroshi Amitsuka

  PHYSICAL REVIEW B 102 (17) 2469-9950 2020/11 [Refereed]
   

  The beryllide GdBe13 with the NaZn13-type face-centered-cubic structure has been known to undergo a proper helical-magnet ordering from experimental studies using polycrystalline samples. In the present study, we carried out electrical resistivity, specific heat, and magnetization measurements of single-crystalline GdBe13 in order to investigate a mechanism of its helical ordering. These measurements reveal that the present compound is a metallic system exhibiting the magnetic ordering of local Gd3+ moments at T-N = 24.8 K accompanied with strong magnetic fluctuations extending to temperatures well above T-N. Furthermore, we constructed a magnetic field-temperature (B-T) phase diagram for B parallel to [001]. It consists of a multidomain state, which is composed of magnetic structures with B applied parallel and perpendicular to the helical plane, in the lower-magnetic-field region below similar to 0.45 T and a possible single-domain conical one in the higher-field region in the ordering state. The helical structure of GdBe(13 )characterized by an incommensurate ordering vector q(0) of (0, 0, 0.285) is discussed on the basis of a competition of Heisenberg exchange interactions between the Gd3+ moments assuming an one-dimensional layer crystal. The sequential change in the exchange interactions determined by a mean-field (MF) calculation can be essentially understood by the Ruderman-Kittel-Kasuya-Yosida interaction via anisotropic Fermi surfaces, whereas the orientation of the magnetic moments will be determined by the dipole-dipole interaction. On the other hand, the MF theory predicts a much smaller critical field B-c than the experimentally obtained one. To discuss the deviation of B-c from the MF calculation, we show a possibility of a fluctuation-induced first-order transition.
• Quadrupolar susceptibility and magnetic phase diagram of PrNi2Cd20 with non-Kramers doublet ground state

  Tatsuya Yanagisawa, Hiroyuki Hidaka, Hiroshi Amitsuka, Shintaro Nakamura, Satoshi Awaji, Elizabeth L. Green, Sergei Zherlitsyn, Joachim Wosnitza, Duygu Yazici, Benjamin D. White, M. Brian Maple

  PHILOSOPHICAL MAGAZINE 100 (10) 1268 - 1281 1478-6435 2020/05 [Refereed][Not invited]
   

  In this study, ultrasonic measurements were performed on a single crystal of cubic PrNi$_2$Cd$_{20}$, down to a temperature of 0.02 K, to investigate the crystalline electric field ground state and search for possible phase transitions at low temperatures. The elastic constant $(C_{11}-C_{12})/2$, which is related to the $\Gamma_3$-symmetry quadrupolar response, exhibits the Curie-type softening at temperatures below $\sim$30 K, which indicates that the present system has a $\Gamma_3$ non-Kramers doublet ground state. A leveling-off of the elastic response appears below $\sim$0.1 K toward the lowest temperatures, which implies the presence of level splitting owing to a long-range order in a finite-volume fraction associated with $\Gamma_3$-symmetry multipoles. A magnetic field-temperature phase diagram of the present compound is constructed up to 28 T for $H \parallel$ [110]. A clear acoustic de Haas-van Alphen signal and a possible magnetic-field-induced phase transition at $H \sim$26 T are also detected by high-magnetic-field measurements.
• Magnetic Phase Diagram of Helical Magnet GdBe13

  Hiroyuki Hidaka, Kota Mizuuchi, Tatsuya Yanagisawa, Hiroshi Amitsuka

  Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019) 2020/03/19 [Refereed]
  
• Rare-Earth Atomic Motion in RBe13 (R: La, Pr, Sm)

  Satoshi Tsutsui, Yusei Shimizu, Hiroyuki Hidaka, Akinari Kohriki, Ryoya Murata, Yoshitaka Yoda, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JPS Conf. Proc 30 011115-1 - 011115-6 2020/03/19 [Refereed][Not invited]
  
• Linearly Polarized Hard X-Ray Photoemission Spectroscopy of PrBe13

  Satoru Hamamoto, Yuina Kanai-Nakata, Hidenori Fujiwara, Kentaro Kuga, Takayuki Kiss, Atsushi Higashiya, Atsushi Yamasaki, Shin Imada, Arata Tanaka, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka, Akira Sekiyama

  Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena 2020/02/13 [Refereed]
  
• Logarithmic Elastic Response in the Dilute Non-Kramers System Y1−xPrxIr2Zn20

  Tatsuya Yanagisawa, Hiroyuki Hidaka, Hiroshi Amitsuka, Sergei Zherlitsyn, Joachim Wosnitza, Yu Yamane, Takahiro Onimaru

  Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena 2020/02/13 [Refereed]
  
• Observation of the 4f ground-state symmetry in strongly correlated cubic Pr compounds probed by linearly polarized 3d core-level photoemission spectroscopy

  S. Hamamoto, Y. Kanai, S. Fujioka, Y. Nakatani, H. Fujiwara, K. Kuga, T. Kiss, A. Higashiya, A. Yamasaki, S. Imada, A. Tanaka, K. Tamasaku, M. Yabashi, T. Ishikawa, H. Hidaka, T. Yanagisawa, H. Amitsuka, K. T. Matsumoto, T. Onimaru, T. Takabatake, A. Sekiyama

  Journal of Electron Spectroscopy and Related Phenomena 238 0368-2048 2020/01 [Refereed]
   

  We report the core-level photoemission study of cubic PrBe13, PrIr2Zn20 and PrB6 using linearly polarized hard X-ray. We have successfully observed linear dichroism (LD) in Pr3+ 3d core-level photoemission spectra reflecting the 4f ground-state symmetry for all the compounds. The observed LDs and polarization-dependent spectra are reproduced by ionic-model calculations including the full multiplet theory and the local crystalline electric field (CEF) splitting. We have confirmed that LDs in Pr3+ 3d core-level photoemission spectra are able to determine unambiguously the Pr3+ 4f ground-state symmetry.
• Spin rotation induced by applied pressure in the Cd-doped Ce2RhIn8 intermetallic compound

  D. S. Christovam, C. Giles, L. Mendonca-Ferreira, J. Leaõ, W. Ratcliff, J. W. Lynn, S. Ramos, E. N. Hering, H. Hidaka, E. Baggio-Saitovich, Z. Fisk, P. G. Pagliuso, C. Adriano

  Physical Review B 100 (16) 2469-9950 2019/10/21 [Refereed]
   

  The pressure evolution of the magnetic properties of the Ce2RhIn7.79Cd0.21 heavy fermion compound was investigated by single crystal neutron magnetic diffraction and electrical resistivity experiments under applied pressure. From the neutron magnetic diffraction data, up to P=0.6GPa, we found no changes in the magnetic structure or in the ordering temperature TN=4.8K. However, the increase of pressure induces an interesting spin rotation of the ordered antiferromagnetic moment of Ce2RhIn7.79Cd0.21 into the ab tetragonal plane. From the electrical resistivity measurements under pressure, we have mapped the evolution of TN and the maximum of the temperature dependent electrical resistivity (TMAX) as a function of the pressure (Pâ‰3.6GPa). To gain some insight into the microscopic origin of the observed spin rotation as a function of pressure, we have also analyzed some macroscopic magnetic susceptibility data at ambient pressure for pure and Cd-doped Ce2RhIn8 using a mean-field model including tetragonal crystalline electric field (CEF). The analysis indicates that these compounds have a Kramers doublet Γ7-type ground state, followed by a Γ7+ first excited state at Δ1∼80K and a Γ6 second excited state at Δ2∼270K for Ce2RhIn8 and Δ2∼250K for Ce2RhIn7.79Cd0.21. The evolution of the magnetic properties of Ce2RhIn8 as a function of Cd doping and the rotation of the direction of the ordered moment for the Ce2RhIn7.79Cd0.21 compound under pressure suggest important changes of the single ion anisotropy of Ce3+ induced by applying pressure and Cd doping in these systems. These changes are reflected in modifications in the CEF scheme that will ultimately affect the actual ground state of these compounds.
• Evidence for the Single-Site Quadrupolar Kondo Effect in the Diluted non-Kramers System Y1-xPrxIr2Zn20

  T. Yanagisawa, Hiroyuki Hidaka, H. Amitsuka, S. Zherlitsyn, J. Wosnitza, Y. Yamane, T. Onimaru

  Physical Review Letters 123 067201  2019/08 [Refereed][Not invited]
  
• Study of the Lattice Instability of URu₂Si₂ in High-Magnetic Field Region

  柳澤達也, 三上義人, 日高宏之, 網塚浩, 中村慎太郎, 淡路智

  東北大学金属材料研究所強磁場超伝導材料研究センター年次報告 2018 92‐93  2019/06 [Not refereed][Not invited]
  
• Magnetic, Transport, and Phonon Properties of the Trivalent Eu Metallic Compound EuBe13

  Hiroyuki Hidaka, Kota Mizuuchi, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 88 (3) 0031-9015 2019/03 [Refereed][Not invited]
   

  Magnetic susceptibility, specific heat, and electrical resistivity measurements have been performed on single-crystal EuBe13 in the temperature range between 2 and 300 K to investigate its phonon property and the valence state of the Eu ion. The obtained temperature dependence of the magnetic susceptibility curves obey a typical Van Vleck susceptibility for Eu3+ with a nonmagnetic ground state in the entire measured temperature range. In the case of the specific heat, we observed the coexistence of Debye and Einstein phonon modes with characteristic Debye and Einstein temperatures of ~ 835 K and ~167 K, respectively, which are in good agreement with those previously reported for other isostructural MBe13 compounds (M = rare earths and actinides). The temperature dependence of the resistivity for EuBe13 shows an unusual T-cubed like dependence at low temperatures, as also observed for the nonmagnetic isostructural compound LaBe13, which can be reproduced well by calculations based on electron--phonon scattering using the estimated Debye temperature and Einstein temperature. We also summarized the relationship between the Eu-valence state and the free distance between the Eu ion and the first-nearest-neighbor atoms in several Eu-based cubic compounds, and argued that EuBe13 takes the Eu3+ state despite its larger free distance than other Eu3+ compounds.
• Hall effect and resistivity in epitaxial MnSi thin films and nanostructures under ambient and high pressure

  D. Menzel, D. Schroeter, N. Steinki, S. Süllow, A. Fernandez-Scarioni, H. Schumacher, H. Okuyama, H. Hidaka, H. Amitsuka

  IEEE Transactions on Magnetics 55 1500204  2019/02 [Refereed][Not invited]
  
• Uncompensated Antiferromagnetic Ordering of UAu2Si2 Studied by Si-29-NMR

  Chihiro Tabata, Yoshihiko Ihara, Shogo Shimmura, Naoyuki Miura, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 87 (11) 114707  0031-9015 2018/11 [Refereed][Not invited]
   

  The magnetically ordered phase of body-centered-tetragonal UAu2Si2 was explored through Si-29-NMR experiments on a magnetically oriented powder sample. The field-swept NMR spectra show asymmetric peak splitting in a magnetic field applied along the tetragonal [001] axis below the magnetic phase transition temperature, T-N = 20K. This splitting is well explained by the occurrence of a magnetic order with a propagation vector of k = (2/3, 0, 0) and magnetic moments pointing parallel to the [001] axis, providing collateral evidence for uncompensated (++-)-type antiferro-magnetic ordering with a spontaneous [001] magnetization component.
• Superconductivity in single crystalline ThBe13 and LuBe13

  Klára Uhlířová, Naoyuki Miura, Vladimír Tkáč, Jan Prokleška, Maciej Chrobak, Zbigniew Tarnawski, Hiroyki Hidaka, Tatsuya Yanagisawa, Vladimír Sechovský, Hiroshi Amitsuka

  Physica B: Condensed Matter 536 516 - 518 0921-4526 2018/05/01 [Refereed][Not invited]
   

  Single crystals of ThBe13 and LuBe13 have been prepared using aluminum flux method. The crystals structure of both compounds was confirmed to be cubic of the NaZn13-type with the lattice parameters a = 10.183(6) Å and a = 10.395(3) Å for LuBe13 and ThBe13, respectively. The low temperature measurements of electrical resistance and ac susceptibility have revealed a BCS-type of superconductivity in ThBe13 below Tc = 125 mK. LuBe13 has been found to be superconducting below Tc = 630 mK.
• Low-Temperature X-ray Crystal Structure Analysis of the Cage-Structured Compounds MBe13 (M = La, Sm, and U)

  Hiroyuki Hidaka, Ryoma Nagata, Chihiro Tabata, Yusei Shimizu, Naoyuki Miura, Tatsuya Yanagisawa, Hiroshi Amitsuka

  Physical Review Materials 2018 2 (5) 2475-9953 2018/04/27 [Refereed][Not invited]
   

  The beryllides MBe13 (M = rare earths and actinides) crystallize in a NaZn13-type cubic structure, which can be categorized as a cage-structured compound. In this study, powder X-ray diffraction measurements have been performed on LaBe13, SmBe13, and UBe13 in the temperature range between 7 and 300 K in order to investigate their crystallographic characteristics systematically. They keep the NaZn13-type cubic structure down to the lowest temperature. We estimated their Debye temperature to be 600 - 750 K from analyses of the temperature dependence of a lattice parameter, being in good agreement with the values reported previously. Rietveld refinements on the obtained powder patterns revealed that the M atom in the 8a site is located in an almost ideal snub cube formed by 24 Be atoms in the 96i site, whose caged structure is unchanged even at the low temperatures. In addition, it is argued from the temperature variation of an isotropic mean-square displacement parameter that the MBe13 compounds commonly have a low-energy phonon mode, which can be described by a model assuming an Einstein oscillation of the M atom with a characteristic temperature of ~ 160 K.
• Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field

  T. Yanagisawa, S. Mombetsu, H. Hidaka, H. Amitsuka, P. T. Cong, S. Yasin, S. Zherlitsyn, J. Wosnitza, K. Huang, N. Kanchanavatee, M. Janoschek, M. B. Maple, D. Aoki

  Physical Review B 97 (15) 2469-9969 2018/04/17 [Refereed][Not invited]
   

  The elastic properties of URu2Si2 in the high magnetic field region above 40 T, over a wide temperature range from 1.5 to 120 K, were systematically investigated by means of high-frequency ultrasonic measurements. The investigation was performed at high magnetic fields to better investigate the innate bare 5f-electron properties, since the unidentified electronic thermodynamic phase of unknown origin, the so-called "hidden order" (HO), and associated hybridization of conduction and f electrons (c-f hybridization) are suppressed at high magnetic fields. From the three different transverse modes we find contrasting results both the Γ4(B2g) and Γ5(Eg) symmetry modes C66 and C44 show elastic softening that is enhanced above 30 T, while the characteristic softening of the Γ3(B1g) symmetry mode (C11-C12)/2 is suppressed in high magnetic fields. These results underscore the presence of a hybridization-driven Γ3(B1g) lattice instability in URu2Si2. However, the results from this work cannot be explained by using existing crystalline electric field schemes applied to the quadrupolar susceptibility in a local 5f2 configuration. Instead, we present an analysis based on a band Jahn-Teller effect.
• Evidence of a New Current-Induced Magnetoelectric Effect in a Toroidal Magnetic Ordered State of UNi4B

  Hiraku Saito, Kenta Uenishi, Naoyuki Miura, Chihiro Tabata, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 87 (3) 033702.1‐033702.5  0031-9015 2018/03 [Refereed][Not invited]
   

  Magnetization measurements under direct electric current were performed in a toroidal magnetic ordered state of UNi4B to test a recent theoretical prediction of current-induced magnetization in a metallic system lacking local-inversion symmetry. We found that electric current parallel to [2110] and [0001] in the hexagonal 4-index notation induces a uniform magnetization along the [0110] direction. The observed behavior of the induced magnetization is essentially consistent with the theoretical prediction; however, it also shows an inconsistency suggesting that the antiferromagnetic state of UNi4B could not be simply regarded as a uniform toroidal order in the ideal honeycomb layered structure.
• Sm valence states and magnetic properties in SmBe13 and SmTi2Al20 investigated by Sm synchrotron-radiation-based Mossbauer spectroscopy

  Satoshi Tsutsui, Yoshio Kobayashi, Jin Nakamura, Michael K. Kubo, Shota Amagasa, Yasuhiro Yamada, Yoshitaka Yoda, Yusei Shimizu, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka, Akira Yamada, Ryuji Higashinaka, Tatsuma D. Matsuda, Yuji Aoki

  HYPERFINE INTERACTIONS 238 0304-3843 2017/11 [Refereed][Not invited]
   

  Synchrotron-Radiation-based Sm-149 Mossbauer spectroscopy was applied to Sm intermetallics, SmBe13 and SmTi2Al20. Temperature dependence of the Mossbauer parameters in SmBe13 indicate the Sm valence state is purely trivalent. SmBe13 also showed second-order Doppler shift in synchrotron-radiation-based Sm-149 Mossbauer spectroscopy. The Mossbauer parameters obtained in SmTi2Al20 suggest that the Sm valence is fluctuating and the magnitude of the magnetic moment is reduced by hybridization between 4f and conduction electrons and/or effect of crystal electric field.
• Magnetically Ordered State and Crystalline-Electric-Field Effects in SmBe13

  Hiroyuki Hidaka, Seigo Yamazaki, Yusei Shimizu, Naoyuki Miura, Chihiro Tabata, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 (7) 0031-9015 2017/07 [Refereed][Not invited]
   

  The physical properties of single-crystalline SmBe13 with a NaZn13-type cubic structure have been studied by electrical resistivity (rho), specific heat (C), and magnetization (M) measurements in magnetic fields of up to 9 T. The temperature (T) dependence of rho shows normal metallic behavior without showing the Kondo -ln T behavior, suggesting the weak hybridization effect in this system. Analyses of the temperature dependence of C suggest that the Sm ions of this compound are trivalent and that the crystalline-electric-field (CEF) ground state is a Gamma(8) quartet with a first-excited state of a Gamma(7) doublet located at the energy scale of similar to 90 K. Mean-field calculations based on the suggested CEF level scheme can reasonably well reproduce the T dependence of magnetic susceptibility (chi) below similar to 70 K. These results in the paramagnetic state strongly indicate that the 4 f electrons are well localized with the Sm3+ configuration. At low temperatures, the 4 f electrons undergo a magnetic order at T-M similar to 8.3 K, where chi(T) shows an antiferromagnetic-like cusp anomaly. From the positive Curie-Weiss temperature obtained from the mean-field calculations and from a constructed magnetic phase diagram with multiple regions, we discussed the magnetic structure of SmBe13 below T-M, by comparing with other isostructural MBe13 compounds showing helical-magnetic ordering.
• Observation of Low-Energy Einstein Phonon and Superconductivity in Single-Crystalline LaBe13

  Hiroyuki Hidaka, Yusei Shimizu, Seigo Yamazaki, Naoyuki Miura, Ryoma Nagata, Chihiro Tabata, Shota Mombetsu, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 (2) 0031-9015 2017/02 [Refereed][Not invited]
   

  The thermal and electrical transport properties of single-crystalline LaBe13 have been investigated by specific-heat (C) and electrical-resistivity (rho) measurements. The specific-heat measurements in a wide temperature range revealed the presence of a hump anomaly near 40K in the C(T)= T curve, indicating that LaBe13 has a low-energy Einstein-like-phonon mode with a characteristic temperature of similar to 177 K. In addition, a superconducting transition was observed in the. measurements at the transition temperature of 0.53 K, which is higher than the value of 0.27K reported previously by Bonville et al. Furthermore, an unusual T-3 dependence was found in rho(T) below similar to 50 K, in contrast to the behavior expected from the electron-electron scattering or the electron-Debye phonon scattering.
• Neutron diffraction study on single-crystalline UAu2Si2

  Chihiro Tabata, Milan Klicpera, Bachir Ouladdiaf, Hiraku Saito, Michal Vališka, Klára Uhlířová, Naoyuki Miura, Vladimír Sechovský, Hiroshi Amitsuka

  Physical Review B 96 (21) 2469-9950 2017 [Refereed]
   

  The magnetic structure of tetragonal UAu2Si2 was investigated by single-crystal neutron-diffraction experiments. Below T-N= 20 K it orders antiferromagnetically with a propagation vector of k = (2/3,0,0) and magnetic moments of uranium ions pointing along the tetragonal c axis. Weak signs of the presence of a ferromagnetic component of magnetic moment were traced out. Taking into account a group theory calculation and experimental results of magnetization and Si-29 nuclear magnetic resonance, the magnetic structure is determined to be a squared-up antiferromagnetic structure, with a stacking sequence (+ + -) of the ferromagnetic ac-plane sheets along the a axis. This result highlights similar magnetic correlations in UAu2Si2 and isostructural URu2Si2.
• Peculiar magnetism of UAu2Si2

  Chihiro Tabata, Naoyuki Miura, Klara Uhlirova, Michal Valiska, Hiraku Saito, Hiroyuki Hidaka, Tatsuya Yanagisawa, Vladimir Sechovsky, Hiroshi Amitsuka

  PHYSICAL REVIEW B 94 (21) 2469-9950 2016/12 [Refereed][Not invited]
   

  Single-crystalline UAu2Si2 has been grown by a floating-zone melting method, and its magnetic, thermal, and transport properties have been investigated through measurements of magnetization, specific heat, and electrical resistivity to reveal its peculiar magnetism. It is shown that UAu2Si2 undergoes a second-order phase transition at T-m = 19 K, which had been believed to be ferromagnetic ordering in the literature, from a paramagnetic phase to an uncompensated antiferromagnetic phase with spontaneous magnetization along the tetragonal c axis (the easy magnetization direction). The magnetic entropy analysis points to the itinerant character of 5f electrons in the magnetic ordered state of UAu2Si2 with large enhancement of the electronic specific heat coefficient of gamma similar to 150 mJ/K(2)mol at 2 K. It also reveals the relatively isotropic crystalline electric field effect of this compound, with contrast to the other relative isostructural compounds. The observed magnetization curves strongly suggest that there is a parasitic ferromagnetic component developing below similar to 50 K in high coercivity with the easy axis along the tetragonal c axis. The results are discussed in the context of evolution of magnetism within the entire family of isostructural UT2Si2 compounds.
• Synchrotron Radiation Mossbauer Spectroscopy Using Sm-149 Nuclei

  Satoshi Tsutsui, Ryo Masuda, Yasuhiro Kobayashi, Yoshitaka Yoda, Kota Mizuuchi, Yusei Shimizu, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka, Fumitoshi Iga, Makoto Seto

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 85 (8) 083704.1‐083704.5  0031-9015 2016/08 [Refereed][Not invited]
   

  Synchrotron radiation Sm-149 Mossbauer spectroscopy in the energy domain has successfully been carried out on Sm2O3, SmBe13, and SmB6. The isomer shift values were determined in these compounds to discuss their Sm valence state. We also investigated the time window effect on spectra, which is useful for measuring spectra with "high-energy-resolution". This effect makes it possible to discuss the frequency of valence fluctuation in Sm compounds as well as determine Sm valence state precisely using the Sm-149 Mossbauer effect. We discussed the fluctuation of the Sm valence in SmB6.
• Study of localized character of 4 f electrons and ultrasonic dispersions in SmOs4Sb12 by high-pressure high-frequency ultrasonic measurements

  S. Mombetsu, T. Murazumi, H. Hidaka, T. Yanagisawa, H. Amitsuka, P. -C. Ho, M. B. Maple

  PHYSICAL REVIEW B 94 (8) 2469-9950 2016/08 [Refereed][Not invited]
   

  We present high-frequency ultrasonic measurements on the filled skutterudite SmOs4Sb12 under hydrostatic pressure. The results clarify that the 4f electrons in this compound transform from delocalized at ambient pressure to localized at high pressures with a crossover pressure of approximately 0.7 GPa. This drastic change in the 4f electrons under pressure is apparently related to the non-Fermi-liquid state, which appears in an intermediate-pressure range of 0.5-1.5 GPa. The results of our analysis strongly suggest that the ferro-octupolar interaction becomes dominant at high pressure. Moreover, we report the pressure dependence of the ultrasonic dispersion, which is due to rattling, over a wide range of ultrasonic frequencies up to 323 MHz. The drastic change in the ultrasonic dispersions and the frequency-dependent elastic anomaly in the C-11 mode at lower temperatures imply a possible coupling between rattling phonons and 4f electrons.
• Crystalline Electric Field and Kondo Effect in SmOs4Sb12

  Shota Mombetsu, Tatsuya Yanagisawa, Hiroyuki Hidaka, Hiroshi Amitsuka, Shadi Yasin, Sergei Zherlitsyn, Jochen Wosnitza, Pei-Chun Ho, M. Brian Maple

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 85 (4) 043704.1-043704.4  0031-9015 2016/04 [Refereed][Not invited]
   

  Our ultrasound results obtained in pulsed magnetic fields show that the filled-skutterudite compound SmOs4Sb12 has the Gamma(67) quartet crystalline-electric-field ground state. This fact suggests that the multipolar degrees of freedom of the Gamma(67) quartet play an important role in the unusual physical properties of this material. On the other hand, the elastic response below approximate to 20 T cannot be explained using the localized 4 f-electron model, which does not take into account the Kondo effect or ferromagnetic ordering. The analysis result suggests the presence of a Kondo-like screened state at low magnetic fields and its suppression at high magnetic fields above 20 T even at low temperatures.
• Effects of hydrostatic pressure on MnSi film

  Hiroyuki Hidaka

  Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu 日本高圧力学会 26 (1) 41 - 47 0917-639X 2016/03/30 [Refereed][Not invited]
   

  Effects of hydrostatic pressure on a thin film of helimagnet MnSi were reviewed. The MnSi film exhibits similar non-Fermi liquid (NFL) behavior near the pressure-induced quantum critical point to that observed in bulk MnSi, although its temperature range is extended to higher temperature side compared with the bulk sample. Since the NFL behavior of MnSi is related with presence of “Skyrmion”, the extended NFL region observed in the thin film may come from stabilization of the Skyrmions due to uniaxial anisotropy. Furthermore, we discussed a general role of hydrostatic pressure in a thin-film sample grown by molecular beam epitaxy.
• High Magnetic Field Study of Elastic Constants of the Cage-structure Compound SmBe13

  S Mombetsu, T Murazumi, K Hiura, S Yamazaki, Y Shimizu, H Hidaka, T Yanagisawa, H Amitsuka, S Yasin, S Zherlitsyn, J Wosnitza

  Journal of Physics: Conference Series 683 012032 - 012032 1742-6588 2016/02/05 [Refereed][Not invited]
   

  Ultrasonic measurements were performed on the cage-structure compound SmBe13. We have investigated the magnetic field temperature phase diagram of this material by using pulsed magnetic fields. We found that the low-temperature magnetic order is suppressed by a magnetic field of 43 T for H parallel to [001], which is smaller than the estimated value from mean-field approximation assuming the Gamma(8) quartet crystal-electric-field ground state and simple antiferromagnetic order. We found that the elastic constant C-44 shows softening below the ordering temperature and has a local minimum below 7 T. These facts suggest that the low temperature state is not a simple antiferromagnetically ordered state. In addition, no elastic anomaly due to rattling modes was found in the present measurements.
• 19aBL-3 Elastic Response of URu_2Si_2 under High-Magnetic Field (Part 3)

  Yanagisawa T., Kanchanavatee N., Janoschek M., Maple M. B., Aoki D., Mombetsu S., Hidaka H., Amitsuka H., Cong P. T., Yashin S., Zherlitsyn S., Wosnitza J., Huang K.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 71 1960 - 1960 2016
• Low-Temperature Magnetism of UAu₂Si₂ Studied by Magnetoresiscance Measurements

  Tabata Chihiro, Miura Naoyuki, Uhlířová Klára, Vališka Michal, Sechovský Vladimír, Saito Hiraku, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 71 1752 - 1752 2016 

  UAu_2_Si_2_は約19Kで強磁性的な秩序を起こすということを除いて、その低温物性は明らかになっていなかった。最近、我々は本物質の単結晶育成に初めて成功し、詳細な基礎物性測定やNMR測定から19Kの秩序が強磁性ではなく、自発磁化を伴うが本質的には反強磁性であることを明らかにしてきた。本講演では磁気抵抗測定の結果を紹介し、輸送現象の側面から本物質の秩序に伴う磁性の変化について議論する。

• Low-Temperature Physical Properties in Th_1-xU_xBe₁₃ (0 < x < 1)

  Miura Naoyuki, Uhlířová Klára, Prchal Jiří, Tabata Chihiro, Sechovský Vladimír, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 71 1755 - 1755 2016 

  UBe_13_はエキゾチックな超伝導を示す重い電子系であり、また、転移温度以上では非フェルミ流体異常を示す。磁性希釈極限系Th_1-x_U_x_Be_13_$(x \leq 0.11)$ では通常フェルミ状態が実現することを我々は既に明らかにしているが、$x = 1$における非フェルミ状態へどのように移行するのかは自明ではない。本公演では全U濃度($0 \leq x \leq 1$)における低温物性（磁化率、電気抵抗、比熱）の実験結果を紹介し、UBe_13_における非フェルミ流体異常の起源について議論する。

• 19aBL-4 ^<29>Si-NMR Study on UAu_2Si_2

  Tabata C., Ihara Y., Shimmura S., Miura N., Saito H., Hidaka H., Yanagisawa T., Amitsuka H.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 71 1961 - 1961 2016
• Magnetic ground-state properties of noncentrosymmetric CePt3B1-xSix

  D. Rauch, P. Horenburg, S. Hartwig, F. J. Litterst, S. Suellow, H. Luetkens, C. Baines, S. Yamazaki, H. Hidaka, H. Amitsuka, E. Bauer

  PHYSICAL REVIEW B 92 (11) 1098-0121 2015/09 [Refereed][Not invited]
   

  We present a study of the alloying series of the noncentrosymmetric f-electron intermetallic CePt3B1-xSix by means of muon spin rotation and relaxation measurements. In addition, we include a high-pressure magnetization investigation of the stoichiometric parent compound CePt3B. From our data we establish the nature of the magnetic ground state properties of the series, derive the ordered magnetic moment as function of stoichiometry, and gain insight into the evolution of the symmetry of the ordered magnetic state with x. We thus can verify the notion that the behavior of the sample series can essentially be understood within the framework of the Doniach phase diagram. Further, our findings raise the issue of the role the Dzyaloshinskii-Moriya magnetic interaction plays in correlated electron materials and its effect on magnetic fluctuations in such materials.
• Pressure temperature phase diagram of CeAg

  Hiroyuki Hidaka, Shinya Otani, Hiraku Saito, Kaori Tatsumi, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 385 428 - 432 0304-8853 2015/07 [Refereed][Not invited]
   

  We have performed electrical-resistivity measurements under hydrostatic pressures ranging up to 4.47 GPa on the cubic compound CeAg. A pressure-temperature phase diagram has been revised in a high-pressure range above similar to 2.1 GPa, where the system is known to enter into an unidentified phase through a first-order phase transition. We have found that the electrical resistivity shows a clear kink anomaly below similar to 4 K in this unknown phase. The anomaly shifts to lower temperature with increasing pressure, and shows a tendency to reach absolute zero at similar to 6 GPa, suggesting the presence of a pressure induced quantum critical point around this pressure. We have also observed that a first order phase boundary line, which separates the phase diagram into two regions of a tetragonal phase and the unidentified phase, seems to terminate in a critical end point located at (P-CEP, T-CEP) similar to(3.2 GPa, 200 K). This suggests that the crystal symmetry of the unidentified phase above similar to 2.1 GPa is also tetragonal. (C) 2015 Elsevier B.V. All rights reserved
• MnSi薄膜における静水圧効果

  HIDAKA HIROYUKI

  未来を拓く高圧力科学技術セミナーシリーズ (40) 61 - 67 0917-6381 2015/02/10 [Refereed][Not invited]
  
• 16aDA-4 Low-Temperature Magnetism of UAu_2Si_2 III

  Tabata C., Ihara Y., Amitsuka H., Miura N., Uhlirova Klara, Valiska Michal, Sechovsky Vladimir, Shimmura S., Saito H., Hidaka H., Yanagisawa T.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 70 1667 - 1667 2015
• 16aDA-10 Ultrasonic Elastic Response for Heavy Fermion Superconductor U_<1-x>Th_xBe_<13>

  Inagaki Hiroyuki, Zherlitsyn S., Wosnitza J., Monbetsu Shota, Shimizu Yusei, Yanagisawa Tatsuya, Hidaka Hiroyuki, Amitsuka Hiroshi, Yazici D., Maple M. B., Cong P. T.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 70 1673 - 1673 2015
• 18pDA-10 Electric Responses of Cage-Structured Compound PrNi_2Cd_<20>

  Yanagisawa T., Wosnitza J., Yazici D., White B. D., Maple M. B., Mombetsu S., Hidaka H., Amitsuka H., Cong P. T., Zherlitsyn S.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 70 2032 - 2032 2015
• 24aBE-8 Low-Temperature Magnetism of UAu_2Si_2 II

  Tabata C., Ihara Y., Shimmura S., Saito H., Miura N., Hidaka H., Yanagisawa T., Amitsuka H.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 70 2347 - 2347 2015
• Ultrasonic Investigation of Magnetic Ordering with Higher-Order Interactions in the Cage-Structured Compound U3Pd20Si6

  Tatsuya Yanagisawa, Kenta Hiura, Shota Mombetsu, Taro Murazumi, Hiroyuki Hidaka, Hiroshi Amitsuka, Naoyuki Tateiwa, Yoshinori Haga

  INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS 2014 (SCES2014) 592 (1) 1742-6588 2015 [Refereed][Not invited]
   

  The elastic properties of localized 5f-electron system U3Pd20Si6 were studied by means of ultrasonic measurements under magnetic fields. We have measured elastic constants C-11, (C-11-C-12)/2, C-44 and C-L110 = C-B + (C-11-C-12)/6 + C-44 in order to check a possible contribution of electric quadrupoles on the magnetically ordered phases of this compound for Gamma(1) Gamma(3), Gamma(5) and Fi e F3 e F5 symmetries elastic response, respectively. We discovered that an elastic anomaly, which is accompanied by ultrasonic attenuation maximum of F5symmetry mode, at around T* similar to 16 K in zero magnetic field and shifts to lower temperatures with increasing magnetic fields. Since the T* seems to be continuously connected to the lower boundary of a 'spin-flop' region in the magnetic field-temperature phase diagram of U3Pd20Si6, we conclude that a fluctuation of the spin-system of the 8c-site ion exists even just below TN and couples to elastic wave via magneto-elastic coupling with F5-symmetry quadrupoles of U's 5f electron or local charge distributions of the guest U ion.
• X-ray backscattering study of crystal lattice distortion in hidden order of URu2Si2

  C. Tabata, T. Inami, S. Michimura, M. Yokoyama, H. Hidaka, T. Yanagisawa, H. Amitsuka

  PHILOSOPHICAL MAGAZINE 94 (32-33) 3691 - 3701 1478-6435 2014/11 [Refereed][Not invited]
   

  We performed synchrotron X-ray diffraction measurements on a small single crystal of [GRAPHICS] with approximate dimensions of [GRAPHICS] . A backscattering diffraction set-up (2 [GRAPHICS] ) in combination with a Si(660) monochromator ensures a high instrumental resolution of [GRAPHICS] , where [GRAPHICS] denotes a lattice-plane spacing and [GRAPHICS] is its spread expressed as the full width at half maximum (FWHM). We carefully measured the (550) Bragg peak in the temperature range between 5 and 25K, and found it to show no signature of broadening and splitting when "Hidden Order (HO)" sets in below 17.5K. Temperature variation of the peak position closely follows the behaviour of the known linear thermal expansion coefficient. Detailed analysis of the peak width reveals that the tetragonal fourfold rotational symmetry of [GRAPHICS] is conserved in HO within the experimental accuracy of the orthorhombicity of [GRAPHICS] . We also found that the (550) peak profile exhibits a temperature-independent fine structure, which indicates that the tetragonal [GRAPHICS] -axis lattice parameter of the used crystal is distributed with a FWHM of [GRAPHICS] .
• Suppressed magnetic order and non-Fermi-liquid behavior in MnSi thin films under hydrostatic pressure

  J. Engelke, D. Menzel, H. Hidaka, T. Seguchi, H. Amitsuka

  PHYSICAL REVIEW B 89 (14) 144413  1098-0121 2014/04 [Refereed][Not invited]
   

  In MnSi thin films themagnetic properties of the B20 compound are influenced by induced uniaxial anisotropy. In comparison to bulk MnSi the critical magnetic fields are enhanced and the Skyrmion phase is found to be enlarged within the magnetic phase diagram. Furthermore the ordering temperature depends on the film thickness reaching 43 K for films of around 10 nm and is considerably higher than in bulk crystals (T-c,T-bulk = 29 K). In bulk MnSi the ordering temperature can be reduced by pressure, where at 1.46 GPa the magnetic order is completely suppressed and a non-Fermi-liquid behavior characterized by a T-3/2 law of the resistivity is observed. We present resistance measurements on MnSi thin films under applied pressure of up to 3.44 GPa. Qualitatively, the behavior is similar to bulk MnSi. However, the critical pressure is considerably enhanced to 3.1 GPa, which is assumed to be a consequence of strain. At high pressure non-Fermi-liquid behavior evidenced by a T-3/2 behavior of the resistance is observed up to T-lin = 30 K, i. e., in a larger temperature range than for bulk MnSi. Uniaxial anisotropy might play an important role in this breakdown of Fermi-liquid behavior, since it stabilizes nontrivial spin structures.
• 27pBE-2 Muon Spin Relaxation Study of SmBe_<13>

  Tabata C., Yamazaki S., Ito T. U., Higemoto W., Miura N., Shimizu Y., Hidaka H., Yanagisawa T., Amitsuka H.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 69 553 - 553 2014
• 10aBK-7 titletitle

  Hiura K., Yanagisawa T., Mombetsu S., Murazumi T., Inagaki H., Hidaka H., Amitsuka H., Tateiwa N., Haga Y.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 69 460 - 460 2014
• Polarized Light Microscopic Study of the Hidden Order Phase in URu2Si2

  Chihiro Tabata, Masashi Tokunaga, Makoto Yokoyama, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JPS Conf. Proc. 3 011062  2014 [Refereed][Not invited]
  
• Simultaneous Measurements of Elastic Constant and Resistivity near the Tc of Non-BCS-Type Superconductor PrOs4Sb1

  Shota Mombetsu, Taro Murazumi, Kenta Hiura, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka, M. Brian Maple

  JPS Conf. Proc. 3 015021  2014 [Refereed][Not invited]
  
• Hybridization-driven orthorhombic lattice instability in URu 2Si2

  T. Yanagisawa, S. Mombetsu, H. Hidaka, H. Amitsuka, M. Akatsu, S. Yasin, S. Zherlitsyn, J. Wosnitza, K. Huang, M. Janoschek, M. B. Maple

  Physical Review B - Condensed Matter and Materials Physics 88 (19) 195150  1098-0121 2013/11/26 [Refereed][Not invited]
   

  We have measured the elastic constant (C11-C12)/2 in URu2Si2 by means of high-frequency ultrasonic measurements in pulsed magnetic fields H [001] up to 61.8 T in a wide temperature range from 1.5 to 116 K. We found a reduction of (C11-C12)/2 that appears only in the temperature and magnetic field region in which URu 2Si2 exhibits a heavy-electron state and hidden order. This change in (C11-C12)/2 appears to be a response of the 5f electrons to an orthorhombic and volume conservative strain field εxx-εyy with Γ3 symmetry. This lattice instability is likely related to a symmetry-breaking band instability that arises due to the hybridization of the localized f electrons with the conduction electrons and is probably linked to the hidden-order parameter of this compound. © 2013 American Physical Society.
• Magnetism of(Th,U)Be_<13>

  Miura N., Shimizu Y., Yamazaki S., Saito H., Tabata C., Mombetsu S., Hidaka H., Yanagisawa T., Amitsuka H.

  Meeting Abstracts of the Physical Society of Japan 一般社団法人 日本物理学会 68 555 - 555 2013
• Neutron Scattering Study on Commensurate and Incommensurate Antiferromagnetic Phases in UPd2Si2 under Uniaxial Stress

  Takahiro Nakada, Makoto Yokoyama, Chihiro Tabata, Hideki Igarashi, Hiroyuki Hidaka, Hiroshi Amitsuka, Kenichi Tenya, Taku J. Sato

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 81 (SUPPL.B) SB020.1-SB020.4  0031-9015 2012/12 [Refereed][Not invited]
   

  The nature of competition between incommensurate (IC) and commensurate (C) antiferromagnetic (AF) orders in UPd2Si2 was investigated by performing elastic neutron scattering experiments under uniaxial stress σ. It is found that applying σ along tetragonal [010] direction reduces the IC-AF order, and then stabilizes the C-AF order. The transition temperature from IC- to C-AF phases TNl is enhanced from 109 K (σ = 0) to 112.5 K at (0.8 GPa), while the onset of IC-AF transition TNh is unchanged from 132 K under σ. In addition, c-axis component qz of the IC-AF modulation at 115 K also increases from 0.736 (σ = 0) to 0.747 (0.8 GPa). The magnitude of C-AF moment at 5 K is estimated to be 2.2 μB/U in the entire σ range presently investigated (σ ≤ 0.8 GPa). These features are similar to those obtained from the investigations using hydrostatic pressure p, indicating that applications of p and σ∥ [010] commonly induce the crystal strains which inherently affect a delicate balance of frustrated magnetic interactions between uranium 5f moments. © 2012 The Physical Society of Japan.
• Γ3-type Lattice Instability and the Hidden Order of URu2Si2

  Tatsuya Yanagisawa, Shota Mombetsu, Hiroyuki Hidaka, Hiroshi Amitsuka, Mitsuhiro Akatsu, Shadi Yasin, Sergei Zherlitsyn, Jochen Wosnitza, Kevin Huang, M. Brian Maple

  Journal of the Physical Society of Japan Physical Society of Japan 82 (1) 13601 - 1-5 0031-9015 2012/11/30 [Refereed][Not invited]
   

  We have performed ultrasonic measurements on single-crystalline URu2Si2 with pulsed magnetic fields, in order to check for possible lattice instabilities due to the hybridized state and the hidden-order state of this compound. The elastic constant (C11-C12)/2, which is associated with a response to the {\Gamma}3-type symmetry-breaking (orthorhombic) strain field, shows a three-step increase at H > 35 T for H || c at low temperatures, where successive meta-magnetic transitions are observed in the magnetization. We discovered a new fact that the absolute change of the softening of (C11-C12)/2 in the temperature dependence is quantitatively recovered at the suppression of hybridized-electronic state and the hidden order in high-magnetic field for H \perp c associated with the successive transitions. The present results suggest that the {\Gamma}3-type lattice instability, is related to both the emergence of the hybridized electronic state and the hidden-order parameter of URu2Si2. On the other hand, magnetic fields H || [100] and [110] enhance the softening of (C11-C12)/2 in the hidden order phase, while no step-like anomaly is observed up to 68.7 T. We discuss the limitation of the localized-electron picture for describing these features of URu2Si2 by examination of a crystalline electric field model in terms of mean-field theory.
• Effects of Pressure on Cage-Structural Compound Ce3Pd20Ge6

  H. Hidaka, S. M. Ramos, E. N. Hering, M. B. Fontes, E. B. Saitovitch, S. Otani, T. Wakabayashi, Y. Shimizu, T. Yanagisawa, H. Amitsuka

  INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011) 391 012019  1742-6588 2012 [Refereed][Not invited]
   

  We have measured the electrical resistivity of clathrate Ce3Pd20Ge6 under high pressure up to 3.86 GPa in order to investigate pressure effects on two successive phase transitions: O-2(0)-type ferroquadrupole order on Ce-8c site at T-Q = 1.2 K and antiferromagnetic order on Ce-4a site at T-N = 0.75 K. With applying pressure, T-Q stays nearly constant at low pressures and gradually decreases above 2 GPa, while T-N first increases and then decreases above 2.5 GPa. From these results, critical pressures, where T-N T-Q become 0, are roughly estimated to be around 5 - 6 GPa. In addition, we found that the magnetic resistivity, which is obtained by subtracting the resistivity of La3Pd20Ge6 from that Ce3Pd20Ge6, exhibits -lnT dependence in two different temperature ranges, suggesting presence of two different Kondo temperatures originated in the two crystallographic Ce-sites.
• Anomalous Upper Critical Field in the Heavy-Fermion Superconductor UBe13 Studied by DC Magnetization Measurements

  Yusei Shimizu, Yoshinori Haga, Kenichi Tenya, Tatsuya Yanagisawa, Hiroyuki Hidaka, Hiroshi Amitsuka

  INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011) 391 (1) 1742-6588 2012 [Refereed][Not invited]
   

  We have studied anomalous upper critical field B-c2(T) of a single crystal of UBe13 by DC magnetization measurements down to 0.14 K and up to 8 T. We have observed a broad anomaly and a peak effect below B-c2 in magnetization curves. Although a possibility of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state has been proposed as an origin of the unusual upper critical field by previous works, our results have shown that thermal equilibrium magnetization curves reveal no step-like behavior, which could be observed at 1st-order phase transition from a superconducting mixed state to the FFLO state. We have also investigated anisotropy of B-c2 for B parallel to < 001 > and B parallel to < 110 >, and found that B-c2 for B parallel to < 001 > is larger than B-c2 for B parallel to < 110 > below similar to 0.5 K. These results might indicate that the anomalous upward curvature of B-c2 in UBe13 is related to anisotropy of B-c2 rather than the FFLO state.
• A Study of Elastic Properties of URu2Si2 in Comparison with the Non-5f Contribution of ThRu2Si2

  T. Yanagisawa, H. Saito, Y. Watanabe, Y. Shimizu, H. Hidaka, H. Amitsuka

  INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011) 391 012079  1742-6588 2012 [Refereed][Not invited]
   

  Ultrasonic investigations of the elastic constants of non-5f compound ThRu2Si2 were performed in order to highlight possible quadrupolar response in the elastic constants of heavy fermion compound URu2Si2, by using the ThRu2Si2 for backgrounds to subtract the phonon contributions in the elastic constants of URu2Si2. We confirmed that the all-elastic constants of ThRu2Si2 show no elastic anomaly, i.e., increasing monotonically and saturating toward low temperatures, which can be understood regular phonon contributions for the solid states. The background-subtracted (C-11-C-12)2 of URu2Si2 keeps decreasing with decreasing temperatures from 300 K, while other share modes C-44 and C-66 show little change. These contrasts suggest that the Gamma(3)-type quadrupole moment O-2(2) will be still dominant and active in URu2Si2 at low temperatures.
• URu₂Si₂の隠れた秩序状態における磁気励起

  網塚浩, 田端千紘, 日高宏之, 柳澤達也, 横山淳, LUMSDEN M. D, KANCHANAVATEE N, BUTCH N. P, MAPLE M. B

  NSL News Lett (2012-1) 13,51-54  2012 [Refereed][Not invited]
  
• Maki Parameter and Upper Critical Field of the Heavy-Fermion Superconductor UBe13

  Yusei Shimizu, Yoichi Ikeda, Takumi Wakabayashi, Yoshinori Haga, Kenichi Tenya, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 80 (9) 1 - 93701 0031-9015 2011/09 [Refereed][Not invited]
   

  We have performed low-temperature specific-heat measurements in magnetic fields for a single crystal UBe13. It has been observed that our sample exhibits a superconducting transition at an intermediate temperature (T-c similar to 0.81 K) between previously reported values for two variant samples called H type and L type. The specific heat C(T) of our sample shows a T-3 behavior below similar to 0.7 T-c, which is similar to the behavior of the H-type sample, suggesting the existence of point nodes in the superconducting gap function. We have obtained the upper-critical-field curves H-c2 for the < 001 >, < 111 >, and < 110 > crystal axes, which show no anisotropy at least down to the lowest measured temperature of 0.5 K. We have also derived the Maki parameter kappa(2), and it has been revealed that the kappa(2) steeply decreases isotropically upon cooling just below T-c. Paramagnetic effects and the symmetry of Cooper pairing of UBe13 are discussed.
• Pressure-induced structural phase transitions in UIr

  H. Kotegawa, S. Araki, T. Akazawa, A. Hori, Y. Irie, S. Fukushima, H. Hidaka, T. C. Kobayashi, K. Takeda, Y. Ohishi, K. Murata, E. Yamamoto, S. Ikeda, Y. Haga, R. Settai, Y. Onuki

  PHYSICAL REVIEW B 84 (5) 054524  1098-0121 2011/08 [Refereed][Not invited]
   

  Strain and resistivity measurements in UIr showed the occurrence of two structural phase transitions under high pressure, indicating the existence of three phases I-III, with slightly different crystal structures. It is suggested that ferromagnetic phases FM1-FM3 emerge in phases I-III, respectively. The pressure-temperature phase diagram was sensitive to the hydrostaticity of pressure. FM3 and superconductivity are observed in the measurements in which Daphne 7373 is used as a pressure-transmitting medium; however they are both absent in the case where petroleum ether is used as a pressure-transmitting medium. These results indicate a close relationship between ferromagnetism and superconductivity.
• Pressure-Induced Quantum Critical Point in Ferromagnet U4Ru7Ge6

  Hiroyuki Hidaka, Sosuke Takahashi, Yusei Shimizu, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 80 (Supplement A) 1 - 102 0031-9015 2011/07 [Refereed][Not invited]
   

  The electrical resistivity rho of the ferromagnet U4Ru7Ge6 has been studied under high pressure up to similar to 4.5 GPa by using an indenter-type high-pressure cell. The Curie temperature T-C = 11.2 K at ambient pressure decreases monotonously with increasing pressure, and seems to disappear at similar to 2.6 GPa, where an enhancement of the coefficient A assuming Fermi liquid regime is observed. This result indicates a presence of a quantum critical point (QCP) of U4Ru7Ge6 at around 2.6 GPa. In addition, non-Fermi liquid behavior (rho similar to T-5/3) predicted by the SCR theory of three dimensional ferromagnet is also observed near the QCP.
• Ultrasonic Measurements on the Cage-Structured Clathrate Compound U3Pd20Si6

  Tatsuya Yanagisawa, Naoyuki Tateiwa, Taichi Mayama, Hitoshi Saito, Hiroyuki Hidaka, Hiroshi Amitsuka, Yoshinori Haga, Yuichi Nemoto, Terutaka Goto

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 80 (Supplement A) 1 - 105 0031-9015 2011/07 [Refereed][Not invited]
   

  Ultrasonic measurements of U3Pd20Si6 were performed in order to investigate elastic properties of the cage-structured compound U3Pd20Si6 and also examine a presence of ultrasonic dispersion (UD) due to off-center rattling, which has been observed in the elastic constant C-44 of similar systems R3Pd20Ge6 (R = La - Nd). At temperatures over antiferromagnetic ordering at T-N = 19 K, neither an up-turn anomaly nor frequency dependence of the elastic constants, regarding the UD, was found. On the other hand, the elastic constant C-44 shows pronounced softening due to crystalline electric field effect of U4+ ion's Gamma(5) triplet ground state for both 4a and 8c sites. Below T-N, precipitous elastic softening accompanied by a sudden depression of ultrasonic echo was observed in each ultrasonic mode. A drastic change of Delta C-44/C-44 similar to 30% at T-N, in particular, implies a strong magneto-elastic coupling of 5f-electrons or a possible contribution of a ferroquadrupole interaction to the antiferromagnetism in U3Pd20Si6.
• Specific Heat and Magnetization Studies of the Superconducting Mixed State of UBe13

  Yusei Shimizu, Yoichi Ikeda, Takumi Wakabayashi, Kenichi Tenya, Yoshinori Haga, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 80 (Supplement A) 1 - 100 0031-9015 2011/07 [Refereed][Not invited]
   

  Low-temperature specific heat and static dc magnetizetion measurements have been performed for the superconducting state of the heavy-fermion compound UBe13. The superconducting phase diagram B-c2-T (B parallel to [110]) has been obtained by our specific heat and magnetization measurements. From the slope of the upper critical field and specific heat jumps at superconducting transition temperatures in magnetic fields, we have also obtained a temperature dependence of Ginzburg-Landau parameter kappa(2) along [110]. It has been revealed that kappa(2) decreases with decreasing temperature down to 0.5 K, which indicates that a paramagnetic effect may be present at least down to 0.5 K for [110].
• Magnetic-Field-Independent Ultrasonic Dispersions in the Magnetically Robust Heavy Fermion System SmOs4Sb12

  Tatsuya Yanagisawa, Yoichi Ikeda, Hitoshi Saito, Hiroyuki Hidaka, Hiroshi Amitsuka, Koji Araki, Mitsuhiro Akatsu, Yuichi Nemoto, Terutaka Goto, Pei-Chun Ho, Ryan E. Baumbach, M. Brian Maple

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 80 (4) 43601 - 043601-4 0031-9015 2011/04 [Refereed][Not invited]
   

  Elastic properties of the filled skutterudite compound SmOs4Sb12 have been investigated by ultrasonic measurements. The elastic constant C-11(omega) shows two ultrasonic dispersions at similar to 15 and similar to 53K for frequencies omega between 33 and 316 MHz, which follow a Debye-type formula with Arrhenius-type temperature-dependent relaxation times and remain unchanged even with applied magnetic fields up to 10 T. The corresponding activation energies were estimated to be E-2 = 105K and E-1 = 409 K, respectively. The latter, E-1, is the highest value reported thus far in the Sb-based filled skutterudites. The presence of magnetically robust ultrasonic dispersions in SmOs4Sb12 implies a possibility that an emergence of a magnetically insensitive heavy fermion state in this system is associated with a novel local charge degree of freedom, which causes the ultrasonic dispersion.
• Pressure-induced bicritical point in UPd2Si2

  H. Hidaka, A. Tanaka, S. Takahashi, T. Yanagisawa, H. Amitsuka

  INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2010) 273 012032  1742-6588 2011 [Refereed][Not invited]
   

  We have studied the effects of pressure on the incommensurate (IC)-commensurate (C) antiferromagnetic (AFM) phase transition of UPd2Si2 by measuring the electrical resistivity up to 4.21 GPa. We observed that the low-temperature C-AFM (type-I) phase expands and prevails over the IC-AFM phase as pressure is increased. The obtained pressure-temperature phase diagram strongly suggests the existence of a novel bicritical point, more specifically, the so-called Lifshitz point at P-c similar to 3.4 GPa, where magnetic modulation continuously changes from IC to C.
• Magnetization in the Superconducting Mixed State of the Heavy-Fermion Compound UBe13

  Yusei Shimizu, Yoichi Ikeda, Takumi Wakabayashi, Kenichi Tenya, Yoshinori Haga, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka

  INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2010) 273 1742-6588 2011 [Refereed][Not invited]
   

  Static dc magnetization measurements in the superconducting mixed state of a single crystal UBe13 along the [110] axis were performed by means of a capacitance Faraday-force method down to 0.24 K. Below the upper critical field B-c2, not only a peak effect but also an additional broad anomaly have been observed in magnetization curves. We report superconducting phase diagram of UBe13 obtained by our magnetization measurements, including these anomalies.
• Elastic Constants of Filled Skutterudite LaRu4As12

  T. Yanagisawa, H. Saitoh, H. Hidaka, H. Amitsuka, T. Cichorek, Z. Henkie, M. B. Maple

  INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2010) 273 012065  1742-6588 2011 [Refereed][Not invited]
   

  Ultrasonic measurements with frequencies varying between 73 and 160 MHz were performed for the LaRu4As12 single crystal. This As-based filled skutterudite compound is a BCS-type superconductor with T-SC as high as 10.3 K. In order to examine a presence of off-center rattling motion in LaRu4As12, we measured elastic constants C-L111 = (C-11 2C(12) 4C(44))/3 and C-T111 = (C-11- C-12 +4C(44))/3, which are related to longitudinal and transverse sound waves propagating along the [111] direction, respectively. No ultrasonic dispersion was found in the whole temperature range from 1.4 to 300 K.
• Elastic constants of U(Ru1−xRhx)2Si2

  T Yanagisawa, H Saito, T Mayama, Y Ikeda, H Hidaka, M Yokoyama, H Amitsuka

  Journal of Physics: Conference Series 200 (1) 012236 - 012236 1742-6596 2010/02 [Refereed]
  
• Elastic constants of U(Ru1-xRhx)(2)Si-2

  T. Yanagisawa, H. Saito, T. Mayama, Y. Ikeda, H. Hidaka, M. Yokoyama, H. Amitsuka

  INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009) 200 012236  1742-6588 2010 [Refereed][Not invited]
   

  Ultrasonic measurements on Rh-substitution system U(Ru1-xRhx)(2)Si-2 (x = 0,0.02 and 0.07) were performed in order to investigate lattice properties for low temperature phase transitions of 'hidden order'(HO) phase and antiferromagnetc (AFM) phase. Elastic constant C-11 vs. T of the x = 0.02 and 0.07 samples exhibit a depression below 80 K, which is similar to a softening in the non-doped sample which had already been reported. The C-11 of x = 0.02 exhibits a step-like anomaly at 14.0 K and an additional softening of 3.2% with minimum at 6.7 K, which correspond to HO and AFM transitions, respectively. The C-11 in x = 0.07 sample only exhibits a shoulder-like anomaly at around 17 K and continue to depress down to 4.2 K.
• Resonant X-ray Scattering Study of Hidden Order in URu2Si2 using a Low-Stress Single Crystal

  H. Amitsuka, T. Inami, M. Yokoyama, S. Takayama, Y. Ikeda, I. Kawasaki, Y. Homma, H. Hidaka, T. Yanagisawa

  INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009) 200 012007  1742-6588 2010 [Refereed][Not invited]
   

  We have studied a puzzling phase below 17.5 K of URu2Si2 by means of resonant Xray scattering (RXS) near the U M-IV absorption edge (E similar to 3.73 keV), using a high-quality single-crystalline sample with low residual stress. We reconfirm that a commensurate (003) superlattice reflection comes purely from antiferromegnetic dipolar order with ordering wave vector Q(AF) = (1, 0, 0). No other traces of significant RXS have been detected in a major region of (h0l) plane, indicating absence of quadrupolar order within a searched Q range including a conceivable nesting vector Q* = (1.4, 0, 0).
• Search for Hidden Order Parameter of URu2Si2 by Neutron-Scattering Experiment under Uniaxial Stress

  Yoichi Ikeda, Makoto Yokoyama, Daichi Nishikawa, Hiroyuki Hidaka, Tatsuya Yanagisawa, Kenichi Tenya, Shuzo Kawarazaki, Taku J. Sato, Hideki Yoshizawa, Hiroshi Amitsuka

  INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009) 200 (SECTION 1) 1742-6588 2010 [Refereed][Not invited]
   

  Elastic neutron-scattering experiment was performed on the heavy-fermion superconductor URu2Si2 under uniaxial stress in order to search a sign of a hidden order parameter. Contour maps of neutron-scattering at 1.5 K were achieved by mesh scanning. No additional magnetic signal exists in (h0l) and (hhl) planes except for a well-known weak antiferromagnetic signal with magnetic-propagation vector of Q = (100) within the present experimental accuracy and scanned area. © 2010 IOP Publishing Ltd.
• Magnetic properties around quantum critical point of CePt1-xRhx

  Ikuto Kawasaki, Daichi Nishikawa, Hiroyuki Hidaka, Tatsuya Yanagisawa, Kenichi Tenya, Makoto Yokoyama, Hiroshi Amitsuka

  PHYSICA B-CONDENSED MATTER 404 (19) 2908 - 2911 0921-4526 2009/10 [Refereed][Not invited]
   

  In order to investigate magnetic properties around a quantum critical point of CePt1-xRhx alloys, we have performed the ac-susceptibility (chi(ac)) measurements with field frequency ranging from omega/2 pi = 0 (dc magnetization) to 1113 Hz for temperature down to 100mK on polycrystalline CePt1-xRhx (x = 0.5, 0.6). The in-phase component of chi(ac) exhibits a pronounced peak at T-f. The peak magnitude and T-f show significant field-frequency dependence. In addition, a staircaselike hysteresis loop of magnetization was observed below 200mK. From the dynamical analyses of chi(ac) we suggest that CePt0.5Rh0.5 and CePt0.4Rh0.6 can be described as cluster-glass systems. (C) 2009 Published by Elsevier B.V.
• Specific heat of EuIn2P2 at high magnetic fields

  Hiroyuki Hidaka, Yoichi Ikeda, Ikuto Kawasaki, Tatsuya Yanagisawa, Hiroshi Amitsuka

  PHYSICA B-CONDENSED MATTER 404 (19) 3005 - 3007 0921-4526 2009/10 [Refereed][Not invited]
   

  We have carried out specific heat measurements on EuIn2P2 at high magnetic fields perpendicular to the c-axis in the hexagonal crystal structure in order to understand its thermal properties. The temperature dependence of the specific heat exhibits a clear lambda-type anomaly due to a magnetic transition at T-C = 24 K, indicating that the magnetic transition is of second-order. The lambda-type anomaly becomes markedly broader with increasing the magnetic field. This remarkable field-dependence is consistent with the results of previous magnetization measurements which suggest that Eu2+ magnetic moments align ferromagnetically perpendicular to the c-axis below T-C. In addition, a hump in the specific heat is observed around 7 K, which can be ascribed to the Zeeman splitting of the Eu2+ multiplet by internal magnetic fields. (C) 2009 Elsevier B.V. All rights reserved.
• Ultrasonic investigation of off-center rattling in Pr0.55Nd0.45Os4Sb12

  Tatsuya Yanagisawa, Taichi Mayama, Hiroyuki Hidaka, Hiroshi Amitsuka, Akio Yamaguchi, Koji Araki, Yuichi Nemoto, Terutaka Goto, Naoya Takeda, Pei-Chun Ho, M. Brian Maple

  PHYSICA B-CONDENSED MATTER 404 (19) 3235 - 3237 0921-4526 2009/10 [Refereed][Not invited]
   

  Ultrasonic measurements on a Pr0.55Nd0.45Os4Sb12 single crystal for temperature down to 20mK and frequencies up to 245 MHz were performed in order to investigate off-center rattling motion of rare-earth ions. The elastic constant C-11 exhibits double ultrasonic dispersions at similar to 15 and similar to 40 K, which are similar to the features found in NdOs4Sb12. The estimated activation energy E-1 = 240 K corresponding to the 40 K-dispersion, possesses an intermediate value between PrOs4Sb12 (E-1 = 115 K) and NdOs4Sb12 (E-1 = 337 K). (C) 2009 Elsevier B.V. All rights reserved.
• Pressure and magnetic field tuned quantum critical point in the Kondo antiferromagnet CePtZn

  S. K. Dhar, R. Kulkarni, H. Hidaka, Y. Toda, H. Kotegawa, T. C. Kobayashi, P. Manfrinetti, A. Provino

  JOURNAL OF PHYSICS-CONDENSED MATTER 21 (15) 156001,1-8  0953-8984 2009/04 [Refereed][Not invited]
   

  We report magnetization, heat capacity and electrical resistivity measurements on CePtZn, which crystallizes in the orthorhombic TiNiSi type structure. Magnetization and electrical resistivity on the iso-structural series of compounds Ce1-xLaxPtZn (x = 0.1, 0.2 0.5 and 1) were also carried out. The electrical resistivity of CePtZn was also measured in external magnetic fields up to 12 T and under pressures up to 2.66 GPa. We find that CePtZn is a dense Kondo lattice, ordering antiferromagnetically at T-N = 1.7 K, with a comparable Kondo temperature. The magnetic transition temperature, T-N, is continuously suppressed both by the magnetic field and pressure and T-N. 0 around 5-6 T and at 1.2 GPa, respectively. Non-Fermi liquid behavior of resistivity at 4 T and 1.2 GPa and logarithmic divergence of the heat capacity, C-4f/T, at 6 T in a limited temperature region strongly suggest the emergence of a quantum critical point as T-N -> 0.
• Observation of charge fluctuations in skutterudite compounds through an Sb-NQR measurement

  H. Kotegawa, Y. Irie, H. Hidaka, T. C. Kobayashi, D. Kikuchi, H. Sugawara, H. Sato

  PHYSICA B-CONDENSED MATTER 403 (5-9) 772 - 774 0921-4526 2008/04 [Refereed][Not invited]
   

  We report that the nuclear spin-spin relaxation rate 1/T-2 shows characteristic peaks in the skutterudite compounds of ROs4Sb12 (R = La, Pr, Nd, and Sm) and PrRu4Sb12. The broadening of Sb-NQR spectrum accompanied with the peak in 1/T-2 suggests that some charge fluctuation exists in these systems and slows down around the peak in 1/T-2. The peaks in 1/T-2 appear around 120 K in all the systems we measured, while the other peaks around 20 K are observed in ROs4Sb12 (R = Pr, Nd, and Sm). The 12 Sb sites are not equivalent at low temperatures in these compounds. (C) 2007 Elsevier B.V. All rights reserved.
• Anomalous Kondo Effect and Ordered State in Heavy Fermion System SmOs4Sb12 : Resistivity, Sb-NQR, and Magnetization Measurements under High Pressure

  Hisashi Kotegawa, Keisuke Tabira, Yuta Irie, Hiroyuki Hidaka, Tatuo C. Kobayashi, Daisuke Kikuchi, Kenya Tanaka, Sho Tatsuoka, Hitoshi Sugawara, Hideyuki Sato

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 77 90 - 95 0031-9015 2008/01 [Refereed][Not invited]
   

  We report resistivity, nuclear quadrupole resonance (NQR), and magnetization measurements under high pressures in a novel heavy fermion compounds SmOs4Sb12. The resistivity and nuclear spin-lattice relaxation rate 1/T-1 show the coherent behavior below a characteristic temperature T* = 20 - 25 K at ambient pressure. Nuclear spin-spin relaxation rate 1/T-2 was found to show a peak of electrical origin around T*. Some charge fluctuation is considered to play an important role in the Kondo effect of SmOs4Sb12. On the other hand, the magnetization at low temperature does not increase under pressures, although the transition temperature increases. The NQR signals are strongly suppressed around the transition temperature and vanishes at low temperatures. These suggest that the ordered state in SmOs4Sb12 is not simple ferromagnetism.
• Connection between charge fluctuations and the coherent temperature in the heavy-fermion system SmOs4Sb12 :: A Sb-121,Sb-123 NQR study

  H. Kotegawa, H. Hidaka, T. C. Kobayashi, D. Kikuchi, H. Sugawara, H. Sato

  PHYSICAL REVIEW LETTERS 99 (15) 156408 - 156412 0031-9007 2007/10 [Refereed][Not invited]
   

  We report Sb-121,Sb- 123 nuclear quadrupole resonance measurements under pressure in a novel heavy fermion (HF) system SmOs4Sb12. The nuclear spin-spin relaxation rate 1/T-2 exhibits a distinct peak near the coherent temperature of the Kondo effect. The isotope effect of Sb-121 and Sb-123 indicates that the peak in 1/T-2 is electrical in origin. The connection between the peak in 1/T-2 and the development of coherency of the Kondo effect is robust even under pressure. It is conjectured that charge fluctuation plays an important role in forming the HF state in SmOs4Sb12.
• Pressure-temperature phase diagram and superconductivity in UIr

  Tatsuo C. Kobayashi, Akihiro Hori, Satoshi Fukushima, Hiroyuki Hidaka, Hisashi Kotegawa, Teruhiko Akazawa, Keiki Takeda, Yasuo Ohishi, Etsuji Yamamoto

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 76 (5) 1 - 51007 0031-9015 2007/05 [Refereed][Not invited]
   

  Pressure-induced superconductivity is found in UIr without inversion symmetry. The pressure-temperature phase diagram has been investigated by means of the electrical resistivity, ac-susceptibility and magnetization measurements under high pressure. The phase diagram consists of three magnetic phases FM1-3 and a superconducting phase. The huge enhancement of residual resistivity and the negative magnetoresistance are found in the intermediate pressure region. These behavior may be induced by the pressure-induced structural phase transition and the accompanied phase separation in this pressure range. The superconducting phase with narrow pressure range is embedded in the FM3 phase, adjacent to zero-temperature FM3-to-nonmagnetic transition. The temperature dependence of resistivity above T-SC follows non-Fermi liquid form of T-1.6. From these experimental facts, superconductivity is considered to be associated with the ferromagnetic fluctuation.
• Effect of uniaxial stress on pressure-induced metal-insulator transition in PrFe4P12

  Hiroyuki Hidaka, Naoki Wada, Hisashi Kotegawa, Tatsuo C. Kobayashi, Daisuke Kikuchi, Hideyuki Sato, Hitoshi Sugawara

  JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 310 (2) E228 - E230 0304-8853 2007/03 [Refereed][Not invited]
   

  We have carried out electrical resistivity measurements on PrFe4P12 under high pressure using some kinds of pressure-transmitting mediums in order to investigate the effect of uniaxial stress on a pressure-induced metal-insulator (M-I) transition. In the measurement under uniaxial stress, the M-I transition appears at a lower pressure than in the case of quasi-hydrostatic pressure, indicating that the uniaxial stress is favorable to the insulating phase. On the other hand, the M-I transition appears suddenly with finite M-I transition temperature between 2.55 and 2.66 GPa in the measurement under hydrostatic pressure. This fact suggests that the transition from the antiferroquadrupolar metallic phase to the insulating phase is of first order. (c) 2006 Elsevier B.V. All rights reserved.
• Pressure-temperature phase diagrams of some heavy fermion systems

  T. C. Kobayashi, H. Hidaka, T. Fujiwara, M. Tanaka, K. Takeda, T. Akazawa, K. Shimizu, S. Kirita, R. Asai, H. Nakawaki, M. Nakashima, R. Settai, E. Yamamoto, Y. Haga, Y. Onuki

  JOURNAL OF PHYSICS-CONDENSED MATTER 19 (12) 125205,1-9  0953-8984 2007/03 [Refereed][Not invited]
   

  We have studied the pressure-temperature phase diagrams in UIr, U3P4, UP2, CeAgSb2 and CeMg2Cu9 by means of the electrical resistivity. Application of pressure suppresses the magnetic ordering shown at ambient pressure in all compounds. In UIr, the pressure-induced superconductivity is observed in the vicinity of the magnetic-nonmagnetic transition. In this article, we review the pressure-temperature phase diagram and the properties of the magnetic nonmagnetic transition in these compounds.
• Nonmagnetic indenter-type high-pressure cell for magnetic measurements

  T. C. Kobayashi, H. Hidaka, H. Kotegawa, K. Fujiwara, M. I. Eremets

  REVIEW OF SCIENTIFIC INSTRUMENTS 78 (2) 023909-023909-5  0034-6748 2007/02 [Refereed][Not invited]
   

  An indenter-type high-pressure cell has been developed for electric and magnetic measurements in low-temperature and high-magnetic-field environments. The maximum pressure achieved at low temperatures is more than 4.5 GPa, which is higher than that of a conventional piston-cylinder cell. The typical sample space at maximum pressure is 1.6 mm in diameter and approximately 0.7 mm in depth, and magnetic measurements such as ac-susceptibility and nuclear magnetic resonance can be performed using a miniature coil. All the components of the indenter cell are made of nonmagnetic materials that have enough thermal conductivity for low-temperature experiments using a He-3/He-4 dilution refrigerator. Another indenter-type cell designed for a commercial superconducting quantum interference device magnetometer is also reported. (c) 2007 American Institute of Physics.
• Transport and magnetic properties of pressure-induced insulating phase in PrFe4P12

  Hiroyuki Hidaka, Hisashi Kotegawa, Satoshi Fukushima, Naoki Wada, Tatsuo C. Kobayashi, Hisatomo Harima, Kenji Fujiwara, Daisuke Kikuchi, Hideyuki Sato, Hitoshi Sugawara

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 75 (9) 1 - 94709 0031-9015 2006/09 [Refereed][Not invited]
   

  We have studied the physical properties of a pressure-induced insulating phase in PrFe4P12 via Hall effect, P-31-NMR and magnetization measurements under quasi-hydrostatic pressure. In the Hall effect measurement, a decrease in the number of hole carriers due to the metal-insulator (M-I) transition is confirmed, indicating a band insulating state. The P-31-NMR spectrum exhibits abrupt broadening and the susceptibility is suppressed markedly owing to the M-I transition, suggesting that an antiferromagnetic ordering occurs in the insulating phase and the M-I transition is of first order. Both spectra corresponding to the metallic and insulating phases are observed simultaneously in a wide temperature range near the M-I transition. This fact reflects the sensitivity of the M-I transition to uniaxial stress, which is confirmed in the resistivity measurement under uniaxial stress.
• Anisotropic behavior in resistivity of RAgSb2 (R = Ce, La)

  Y Watanabe, Y Inada, H Hidaka, H Kotegawa, TC Kobayashi, TD Matsuda, D Aoki

  PHYSICA B-CONDENSED MATTER 378-80 827 - 828 0921-4526 2006/05 [Refereed][Not invited]
   

  CeAgSb2 crystallizes in the tetragonal ZrCuSi2 type structure (P4/nmm), which consists of Sb-Ce, Sb-Ag-Ce, Sb-Sb layers. It shows the peculiar anisotropic ferromagnetic ordering below 9.7 K with a small ordered moment of 0.33 mu B. Its residual resistivity steeply increases above p(c) congruent to 3.3 GPa where the magnetic order disappears. It is expected that the p-f mixing on the peculiar hollow square pillar-like Fermi surface plays an important role in CeAgSb2, while similar Fermi surfaces were not observed in LaAgSb,. We have measured the anisotropy in the electrical resistivity of CexLa1-xAgSb2 to study the p-f mixing effect. Small humps were observed in the temperature dependence of the resistivity in (CeLa1-xAgSb2)-La-x. We expected them the CDW transition. The CDW state coexisted with the ferromagnetic state around x = 0.2. (c) 2006 Elsevier B.V. All rights reserved.
• Pressure-induced superconductivity in CeNiGe3

  H Kotegawa, T Miyoshi, K Takeda, S Fukushima, H Hidaka, K Tabata, TC Kobayashi, M Nakashima, A Thamizhavel, R Settai, Y Onuki

  PHYSICA B-CONDENSED MATTER 378-80 419 - 420 0921-4526 2006/05 [Refereed][Not invited]
   

  An antiferromagnet CeNiGe3, which exhibits a quantum critical point at P-C-6-7 GPa, shows the superconductivity in wide pressure range of 1.7-9.3 GPa. In addition to the superconductivity around P-C, the sharp Superconducting transition can be observed by both the resistivity and the susceptibility measurements at lower pressure region far apart from P-C, where 4f-localized Picture seems to be still dominant. Such a superconductivity is a first example in the f-electron systems. (c) 2006 Elsevier B.V. All rights reserved.
• Pressure-induced superconductivity in ferromagnet UIr without inversion symmetry

  TC Kobayashi, S Fukushima, H Hidaka, H Kotegawa, T Akazawa, E Yamamoto, Y Haga, R Settai, Y Onuki

  PHYSICA B-CONDENSED MATTER 378-80 355 - 358 0921-4526 2006/05 [Refereed][Not invited]
   

  High-pressure AC-susceptibility measurement has been carried out in UIr. Three series of peaks corresponding to the successive ferromagnetic transitions indicate the existence of three ferromagnetic phases FM 1-3. The phase boundary between FM2 and FM3 was not realized in the resistivity measurement. The Meissner effect is observed successfully in the pressure range of 2.63-2.74 GPa where the peak of AC-susceptibility survives. This result indicates that the superconducting phase is embedded in the FM3 phase with the ordered moment less than 0.051 mu(B)/U and adjoins the quantum critical point. (c) 2006 Elsevier B.V. All rights reserved.
• Pressure-induced superconductivity emerging from antiferromagnetic phase in CeNiGe3

  H Kotegawa, K Takeda, T Miyoshi, S Fukushima, H Hidaka, TC Kobayashi, T Akazawa, Y Ohishi, M Nakashima, A Thamizhavel, R Settai, Y Onuki

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 75 (4) "044713 - 1"-"044713-6" 0031-9015 2006/04 [Refereed][Not invited]
   

  The antiferromagnet CeNiGe3 exhibits superconductivity under pressure. The Neel temperature initially increases with increasing pressure up to 3GPa and then becomes zero at a critical pressure (P-C) that is located at approximately 7GPa. We found that superconductivity emerges from 1.7 GPa in the antiferromagnetic (AF) phase removed from P-C. The superconductivity is realized in a wide pressure region including P-C. The coefficient A in the resistivity and the upper critical field (H,2) significantly change against pressure. A feature of CeNiGe3 is that the moderate heavy fermion state in the AF phase induces superconductivity.
• Anisotropic residual resistivity under high pressure in UIr

  Akihiro Hori, Hiroyuki Hidaka, Hisashi Kotegawa, Tatsuo C. Kobayashi, Teruhiko Akazawa, Syugo Ikeda, Etsuji Yamamoto, Yoshinori Haga, Rikio Settai, Yoshichika Onuki

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 75 82 - 84 0031-9015 2006/01 [Refereed][Not invited]
   

  Anisotropic resistivity in UIr has been investigated under high pressure. A huge enhancement of residual resistivity was found under high pressure for the measuring current parallel to the [0 1 0] direction while any anomalies were not observed in the resistivity for [1 0 (1) over bar]. The residual resistivity for [0 1 0] reduced to the original value in the pressure range where superconductivity appears. This anomalous behavior indicates that the ground state in the high-rho(0) state is not simple ferromagnet and the application of pressure induces the first-order transition to slightly different electronic state.
• Heavy fermion compound SmOs4Sb12 in vicinity of ferromagnetic critical point

  H Kotegawa, H Hidaka, Y Shimaoka, T Miki, TC Kobayashi, D Kikuchi, H Sugawara, H Sato

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 74 (8) 2173 - 2176 0031-9015 2005/08 [Refereed][Not invited]
   

  We report nuclear quadrupole resonance (NQR) measurement at ambient pressure and resistivity measurement under high pressure in the new heavy fermion (HF) compound SmOs4Sb12. The NQR spectrum and the nuclear spin-lattice relaxation rate (1/T-1) clearly demonstrate the bulk nature of ferromagnetic ordering below T-C similar to 2 K. The temperature dependence of 1/T-1 exhibits the characteristic behaviors of a Kondo lattice. The application of pressure decreases Kondo temperature and stabilizes the magnetic ordering, which is the same tendency as that found in some Yb-based compounds. The obtained phase diagram indicates SmOs4Sb12 to be in the vicinity of its ferromagnetic critical point.
• Pressure-induced Superconductivity in UIr

  小林達生, 日高宏之, 福島賢, 小手川恒, 赤沢輝彦, 摂待力生, 大貫惇睦, 山本悦嗣, 芳賀芳範

  固体物理 40 (6) 415 - 420 0454-4544 2005/06/15 [Refereed][Not invited]
  
• Pressure-induced charge ordering of LiV2O4

  K Takeda, H Hidaka, H Kotegawa, TC Kobayashi, K Shimizu, H Harima, K Fujiwara, K Miyoshi, J Takeuchi, Y Ohishi, T Adachi, M Takata, E Nishibori, M Sakata, T Watanuki, O Shimomura

  PHYSICA B-CONDENSED MATTER 359 1312 - 1314 0921-4526 2005/04 [Refereed][Not invited]
   

  The powder X-ray diffraction experiments of LiV2O4 have been performed at low temperature and high pressure using synchrotron radiation. In the isothermal experiment at 10 K, the cubic-rhombohedral phase transition corresponding to the metal-insulator transition is found at around 13 GPa. This transition seems to be due to charge ordering of V ions on the analogy of the metal-insulator transition in AlV2O4. (c) 2005 Elsevier B.V. All rights reserved.
• Metal-insulator transition under high pressure in PrFe4P12

  H Hidaka, Ando, I, H Kotegawa, TC Kobayashi, H Harima, M Kobayashi, H Sugawara, H Sato

  PHYSICA B-CONDENSED MATTER 359 886 - 888 0921-4526 2005/04 [Refereed][Not invited]
   

  We have studied the electrical resistivity in a skutterudite compound PrFe4P12 under high pressure. An antiferroquadrupolar ordering temperature T-Q decreases monotonously with increasing pressure up to 2.4 GPa. Above 2.4 GPa, the metal-insulator (M-I) transition appears. By applying magnetic field, this M-I transition is suppressed easily and heavy-fermion state is realized. The observed Kondo effect and the field-induced heavy-fermion state at high pressure suggest that the quadrupolar interactions of the f electrons of Pr3+ survive even in the insulator phase. (c) 2005 Elsevier B.V. All rights reserved.
• Pressure-induced superconductivity in UIr without inversion symmetry

  T Akazawa, H Hidaka, H Kotegawa, TC Kobayashi, T Fujiwara, E Yamamoto, Y Haga, R Settai, Y Onuki

  PHYSICA B-CONDENSED MATTER 359 1138 - 1140 0921-4526 2005/04 [Refereed][Not invited]
   

  Pressure-induced superconductivity is found in UIr without inversion symmetry. The pressure-temperature phase diagram has been investigated by means of electrical resistivity and magnetization. The phase diagram consists of two ferromagnetic phases. The ferromagnetic phase FM1 with T-Cl similar to 46 K at ambient pressure disappears around 1.7 GPa. With further increase of pressure, the phase (FM2) with small ferromagnetic moment appears in the pressure range of P-Cl < P < 2.6 GPa. The superconducting phase exists near the disappearance point of the FM2 phase, indicating that the superconductivity is associated with the ferromagnetic critical fluctuation around P-C2. (c) 2005 Elsevier B.V. All rights reserved.
• Pressure-induced metal-insulator transition in the filled skutterudite PrFe 4P 12

  Hiroyuki Hidaka, Ikuma Ando, Hisashi Kotegawa, Tatsuo C. Kobayashi, Hisatomo Harima, Miki Kobayashi, Hitoshi Sugawara, Hideyuki Sato

  Physical Review B - Condensed Matter and Materials Physics 71 (7) 073102.1-073102.4  1098-0121 2005/02 [Refereed][Not invited]
   

  We have studied the electrical resistivity of the filled skutterudite compound PrFe 4P 12 under high pressure. The antiferroquadrupolar ordering temperature T Q decreases monotonically with increasing pressure up to 2.4 GPa. Above 2.4 GPa, we have found that a metal-insulator (M-I) transition appears. The insulating state is easily suppressed by a magnetic field. The observed Kondo effect and a field-induced heavy-fermion state at high pressure suggest that the quadrupolar interactions survive in the insulating region. The quadrupolar interactions might play an essential role in the M-I transition. PrFe 4P 12 is an unusual compound in that it shows a pressure-induced transition from a metal to an insulator. ©2005 The American Physical Society.
• Pressure-induced metal-insulator transition in the filled skutterudite PrFe4P12

  H Hidaka, Ando, I, H Kotegawa, TC Kobayashi, H Harima, M Kobayashi, H Sugawara, H Sato

  PHYSICAL REVIEW B 71 (7) 2469-9950 2005/02 [Refereed][Not invited]
   

  We have studied the electrical resistivity of the filled skutterudite compound PrFe4P12 under high pressure. The antiferroquadrupolar ordering temperature T-Q decreases monotonically with increasing pressure up to 2.4 GPa. Above 2.4 GPa, we have found that a metal-insulator (M-I) transition appears. The insulating state is easily suppressed by a magnetic field. The observed Kondo effect and a field-induced heavy-fermion state at high pressure suggest that the quadrupolar interactions survive in the insulating region. The quadrupolar interactions might play an essential role in the M-I transition. PrFe4P12 is an unusual compound in that it shows a pressure-induced transition from a metal to an insulator.
• Pressure-induced superconductivity in UIr

  T Akazawa, H Hidaka, H Kotegawa, TC Kobayashi, T Fujiwara, E Yamamoto, Y Haga, R Settai, Y Onuki

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 73 (11) 3129 - 3134 0031-9015 2004/11 [Refereed][Not invited]
   

  Pressure-induced superconductivity is found in UIr without inversion symmetry. The pressure-temperature phase diagram has been investigated by means of the electrical resistivity and magnetization measurements under high pressure. The phase diagram consists of two magnetic phases, the Ising-like ferromagnetic phase (FM1) at low pressures and another magnetic phase (FM2) with the small ferromagnetic component along the [101] direction at high pressures. Superconductivity is observed in the narrow pressure range near the disappearance point of the FM2 phase, where the temperature dependence of resistivity follows the non-Fermi liquid form of T-1.6. From these experimental facts, the superconductivity is considered to be associated with the critical fluctuation with the disappearance of FM2 phase.
• Pressure-induced superconductivity in ferromagnetic UIr without inversion symmetry

  T Akazawa, H Hidaka, T Fujiwara, TC Kobayashi, E Yamamoto, Y Haga, R Settai, Y Onuki

  JOURNAL OF PHYSICS-CONDENSED MATTER 16 (4) L29 - L32 0953-8984 2004/02 [Refereed][Not invited]
   

  We report the discovery of pressure-induced superconductivity in ferromagnetic UIr, which lacks inversion symmetry in the crystal structure. The Curie temperature T-CI = 46 K at ambient pressure decreases with increasing pressure, reaching a value of 11 K at 1.5 GPa. It presumably decreases further up to about P-cl = 1.7 GPa. The ferromagnetic region named 'Fl' exists up to P-cl. A second magnetic phase named 'F2' with a low ferromagnetic moment appears in the pressure range frorn 1.9 to 2.4 GPa. In the 'F2' phase, the magnetic transition temperature T-C2 decreases with pressure, from 18 K at 1.9 GPa to approximately zero at P-C2 = 2.6-2.7 GPa. In this critical pressure region, superconductivity appears below T-sc = 0.14 K.

MISC

• Lattice Instability of UTe₂ under High Magnetic Field

  柳澤達也, 牛田啓太, 日比野瑠央, 日高宏之, 網塚浩, 木俣基, 中村慎太郎, 淡路智, 青木大  東北大学金属材料研究所強磁場超伝導材料研究センター年次報告  2022-  2023
• Anisotropy of lattice distortion in CeCoSi studied by linear thermal expansion measurements under magnetic field II

  小野寺進太朗, 日高宏之, 早坂英海, 松本雄大, 柳谷駿, 柳澤達也, 網塚浩, 谷田博司  日本物理学会講演概要集(CD-ROM)  78-  (1)  2023
• CDW and AFM Ordered States in UPt₂Si₂ studied by Resonant X-Ray Scattering III

  今布咲子, 田端千紘, 三浦紘大, 日比野瑠央, 日高宏之, 柳澤達也, 中尾裕則, 網塚浩  日本物理学会講演概要集(CD-ROM)  78-  (1)  2023
• Magnetic Ordering and Crystalline-Electric-Field Effect in Single-Crystalline NdBe₁₃

  日高宏之, 水内康太, 三浦植幸, 松本雄大, 田端千紘, 柳澤達也, 網塚浩  日本物理学会講演概要集(CD-ROM)  78-  (2)  2023
• Elastic response of UPt₂Si₂ with charge density wave ordering

  松田政杜, 柳澤達也, 今布咲子, 日比野瑠央, 日高宏之, 網塚浩  日本物理学会講演概要集(CD-ROM)  78-  (2)  2023
• Magnetic Structure Analysis of UPt₂Si₂ by Polarized Neutron Diffraction Measurement

  今布咲子, 田端千紘, 齋藤開, 中島多朗, 中島多朗, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集(CD-ROM)  78-  (2)  2023
• Ultrasonic measurements on URhSn with a quasi-kagome structure

  土田健登, 日比野瑠央, 松田政杜, 日高宏之, 柳澤達也, 網塚浩, 田端千紘, 清水悠晴  日本物理学会講演概要集(CD-ROM)  78-  (2)  2023
• Study of the Elastic Response on the Heavy-Fermion Superconductor (U,Th)Be₁₃

  日比野瑠央, 稲垣宏幸, 柳澤達也, 日高宏之, 網塚浩, 清水悠晴, ZHERLITSYN Sergei, WOSNITZA Joachim, WOSNITZA Joachim, YAZICI Duygu, MAPLE M. Brian  日本物理学会講演概要集(CD-ROM)  78-  (2)  2023
• The interplay between charge density wave and magnetism in UPt₂Si₂ studied by polarized neutron diffraction measurements

  今布咲子, 田端千紘, 齋藤開, 中島多朗, 中島多朗, 日高宏之, 柳澤達也, 網塚浩  日本中性子科学会年会講演概要集  23rd-  2023
• Study of the Lattice Instability of URu₂Si₂ in High-Magnetic Field Region (part 3)

  柳澤達也, 日高宏之, 網塚浩, 木俣基, 中村慎太郎, 淡路智  東北大学金属材料研究所強磁場超伝導材料研究センター年次報告  2021-  2022
• CDW and AFM Ordered States in UPt₂Si₂ studied by Resonant X-Ray Scattering

  今布咲子, 三浦紘大, 日比野瑠央, 日高宏之, 柳澤達也, 田端千紘, 中尾裕則, 網塚浩  日本物理学会講演概要集(CD-ROM)  77-  (1)  2022
• Electric Quadrupolar Fluctuation in the Center of Vortex-like Magnetic Structure of UNi₄B

  柳澤達也, 松盛泰明, 齋藤開, 日高宏之, 網塚浩, 中村慎太郎, 淡路智, GORBUNOV D.I., ZHERLITSYN S., WOSNITZA J., WOSNITZA J., UHLIROVA K., VALISKA M., SECHOVSKY V.  Selected Topics Research Highlight at HFLSM  2021-  2022
• Elemental Dilution Effect on the Ultrasonic Dispersion of Non-Kramers Compound Y_1-xPr_xIr₂Zn₂₀

  日比野瑠央, 柳澤達也, 三上義人, 日高宏之, 網塚浩, ZHERLITSYN Sergei, WOSNITZA Joachim, WOSNITZA Joachim, 山根悠, 鬼丸孝博  日本物理学会講演概要集(CD-ROM)  77-  (1)  2022
• Detailed magnetic field-temperature phase diagram of CeCoSi constructed by fundamental physical property measurements under high magnetic field: II

  柳谷駿, 日高宏之, 早坂英海, 柳澤達也, 網塚浩, 谷田博司  日本物理学会講演概要集(CD-ROM)  77-  (2)  2022
• Elastic Properties and Crystalline-Electric-Field Effects of UIr₂Si₂

  松田政杜, 柳澤達也, 日比野瑠央, 今布咲子, 日高宏之, 網塚浩  日本物理学会講演概要集(CD-ROM)  77-  (2)  2022
• Anisotropy of lattice distortion in CeCoSi studied by linear thermal expansion measurements under magnetic field

  日高宏之, 早坂英海, 柳谷駿, 柳澤達也, 網塚浩, 谷田博司  日本物理学会講演概要集(CD-ROM)  77-  (2)  2022
• CDW and AFM Ordered States in UPt₂Si₂ studied by Resonant X-Ray Scattering: II

  今布咲子, 田端千紘, 三浦紘大, 日比野瑠央, 日高宏之, 柳澤達也, 中尾裕則, 網塚浩  日本物理学会講演概要集(CD-ROM)  77-  (2)  2022
• Observation of current-induced magnetization in an odd-parity augmented multipole system UPt₂Si₂

  三浦紘大, 今布咲子, 高力暁成, 田端千紘, 日高宏之, 柳澤達也, 中尾裕則, 網塚浩  日本物理学会講演概要集(CD-ROM)  76-  (2)  2021
• Magnetic Rotation Effect on the Elastic Response of URu₂Si₂ under High Magnetic Field

  柳澤達也, 三上義人, 日比野瑠央, 日高宏之, 網塚浩, 木俣基, 中村慎太郎, 淡路智  日本物理学会講演概要集(CD-ROM)  76-  (2)  2021
• Low temperature properties of heavy electron system UIr₂Si₂ in magnetic field

  今布咲子, 村田怜也, 日高宏之, 柳澤達也, 田端千紘, 清水悠晴, 青木大, 網塚浩  日本物理学会講演概要集(CD-ROM)  76-  (2)  2021
• Possible tilted helical ordering and magnetic anisotropy in SmBe₁₃

  日高宏之, 井原慶彦, 山崎聖悟, 三浦植幸, 柳澤達也, 網塚浩  日本物理学会講演概要集(CD-ROM)  76-  (2)  2021
• Study for low-temperature ordered state in CeCoSi by linear thermal expansion measurement under electric current and magnetic field

  早坂英海, 日高宏之, 金子佑真, 柳谷駿, 柳澤達也, 網塚浩, 谷田博司  日本物理学会講演概要集(CD-ROM)  76-  (2)  2021
• Detailed magnetic field-temperature phase diagram of CeCoSi constructed by fundamental physical property measurements under high magnetic field

  柳谷駿, 日高宏之, 早坂英海, 金子佑真, 柳澤達也, 網塚浩, 谷田博司  日本物理学会講演概要集(CD-ROM)  76-  (2)  2021
• Verification for electric toroidal quadrupole ordering in Cd₂Re₂O₇ by thermal expansion measurement under magnetic field and electric current

  金子佑真, 日高宏之, 村田怜也, 早坂英海, 柳澤達也, 網塚浩, 田島聖士, 平井大悟郎, 廣井善二  日本物理学会講演概要集(CD-ROM)  76-  (2)  2021
• Magnetic toroidal order of UNi₄B studied by resonant X-ray scattering

  田端千紘, 村田怜也, 今布咲子, 早坂英海, 日比野瑠央, 金子佑真, 中尾裕則, 齋藤開, 清水悠晴, 青木大, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集(CD-ROM)  76-  (2)  2021
• Study of the Lattice Instability of URu₂Si₂ in High-Magnetic Field Region (part 2)

  柳澤達也, 三上義人, 日高宏之, 網塚浩, 木俣基, 中村慎太郎, 淡路智  東北大学金属材料研究所強磁場超伝導材料研究センター年次報告  2020-  2021
• UNi₄Bのトロイダル秩序における強磁場弾性応答

  柳澤達也, 齋藤開, 日高宏之, 網塚浩, 中村慎太郎, 淡路智  東北大学金属材料研究所強磁場超伝導材料研究センター年次報告  2017-  2018
• URu₂Si₂の隠れた秩序における4回回転対称性の検証

  立松愛梨, 日高宏之, 柳澤達也, 網塚浩, 仲村愛, 本間佳哉, 本多史憲, 青木大  日本物理学会講演概要集(CD-ROM)  72-  (2)  2017
• UNi₄Bのトロイダル秩序状態における新奇電流磁気交差相関の研究 II

  網塚浩, 齋藤開, 柳澤達也, 日高宏之, 鹿内奈南, 立松愛梨, 田端千紘, 本間佳哉, 李徳新, 清水悠晴, 仲村愛, 本多史憲, 青木大  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  34-  2017
• X線後方散乱によるURu₂Si₂の隠れた秩序相における結晶4回回転対称性の検証

  網塚浩, 田端千紘, 齋藤開, 柳澤達也, 日高宏之, 稲見俊哉, 青木大, 本多史憲, 本間佳哉, 仲村愛  日本物理学会講演概要集(CD-ROM)  71-  (1)  2016
• 強相関5f電子系化合物における量子異常の研究と新規物性の探索

  網塚浩, 田端千紘, 三浦植幸, 柳澤達也, 日高宏之, 本間佳哉, 李徳新, 本多史憲, 青木大  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2014-  2015
• 強相関5f電子系における量子異常の解明と探索

  網塚浩, 田端千紘, 三浦植幸, 立松愛梨, 柳澤達也, 日高宏之, 本間佳哉, 本多史憲, 李徳新, 仲村愛, 青木大  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  32-  2015
• 強相関5f電子系化合物における量子異常の研究と新規物性の探索

  網塚浩, 田端千紘, 三浦植幸, 柳澤達也, 日高宏之, 本間佳哉, 李徳新, 本多史憲, 青木大  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  30th-  2014
• URu₂Si₂の隠れた秩序における構造変化の検証

  網塚浩, 田端千紘, 日高宏之, 柳澤達也, 熊井玲児, 小林賢介, 中尾裕則, 村上洋一, 稲見俊哉, 道村真司, 横山淳  物構研サイエンスフェスタ要旨集  2013-  2014
• Physical Properties of the Cage Structural Compound RBe_<13>(R=Rare Earths)

  Hidaka H., Yamazaki S., Saito H., Shimizu Y., Mombetsu S., Murazumi T., Miura N., Tabata C., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  68-  (2)  445  -445  2013/08/26
• Elastic Property of the Rare Earth-based Cage Structural Compound SmBe_<13>

  Mombetsu S., Murazumi T., Hiura K., Yamazaki S., Shimizu Y., Hidaka H., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  68-  (2)  445  -445  2013/08/26
• 26aXA-4 Elastic Responses of URu_2Si_2 under High-Magnetic Fields

  Yanagisawa T., Mombetsu S., Hidaka H., Amitsuka H., Akatsu M., Yasin Shadi, Zherlitsyn Sergei, Wosnitza Jochen, Huang Kevin, Maple M. Brian  Meeting abstracts of the Physical Society of Japan  68-  (1)  569  -569  2013/03/26
• 26aXA-2 X-ray diffraction study of URu_2Si_2 III

  Tabata C., Hidaka H., Yanagisawa T., Yokoyama M., Amitsuka H., Kobayashi K., Kumai R., Nakao H., Murakami Y.  Meeting abstracts of the Physical Society of Japan  68-  (1)  568  -568  2013/03/26
• 26aXA-7 Elastic Response of U_3Pd_<20>Si_6 in Magnetic Field

  Hiura K., Mombetsu S., Hidaka H., Yanagisawa T., Amitsuka H., Tateiwa N., Haga Y.  Meeting abstracts of the Physical Society of Japan  68-  (1)  570  -570  2013/03/26
• 26aXA-6 Uniaxial-stress effect on commensurate-incommensurate antiferromagnetic orders in UPd_2Si_2

  Yokoyama M., Nakada T., Tabata C., Hidaka H., Amitsuka H., Tenya K., Sato T. J.  Meeting abstracts of the Physical Society of Japan  68-  (1)  569  -569  2013/03/26
• 26pXT-16 Low-temperature Physical Property on the Cage Structural Compound SmBe_<13>

  Yamazaki S., Shimizu Y., Saito H., Tabata C., Mombetsu S., Hidaka H., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  68-  (1)  587  -587  2013/03/26
• 26pXT-12 Simultaneous Measurement of Elastic Constant and Resistivity Near the T_c of Non-BCS-type Superconductor PrOs_4Sb_<12> II

  Mombetsu S., Hiura K., Hidaka H., Yanagisawa T., Amitsuka H., Maple M. B.  Meeting abstracts of the Physical Society of Japan  68-  (1)  586  -586  2013/03/26
• 29aEN-9 Effects of Pressure on Ferromagnet CeAg III

  Hidaka H., Saito H., Otani S., Tatsumi K., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  68-  (1)  685  -685  2013/03/26
• カゴ状構造を持つSmBe₁₃の低温物性

  山崎聖悟, 清水悠晴, 齋藤開, 田端千紘, 門別翔太, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集  68-  (1)  2013
• 希土類カゴ状化合物SmBe₁₃の弾性応答

  門別翔太, 村住太郎, 日浦健太, 山崎聖悟, 清水悠晴, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集  68-  (2)  2013
• 強磁性体CeAgの圧力効果 IV

  大谷真也, 日高宏之, 齋藤開, 巽かおり, 柳澤達也, 網塚浩  日本物理学会講演概要集  68-  (2)  2013
• 同心軸を用いた低温用2軸独立回転試料プローブの開発

  安孫子和弘, 齋藤開, 三浦植幸, 上西健太, 瀬口泰生, 田端千紘, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集  68-  (2)  2013
• カゴ状化合物RBe₁₃(R=希土類)の基礎物性

  日高宏之, 山崎聖悟, 齋藤開, 清水悠晴, 門別翔太, 村住太郎, 三浦植幸, 田端千紘, 柳澤達也, 網塚浩  日本物理学会講演概要集  68-  (2)  2013
• URu₂Si₂における放射光X線構造解析

  田端千紘, 日高宏之, 柳澤達也, 横山淳, 網塚浩, 小林賢介, 熊井玲児, 中尾裕則, 村上洋一  物構研サイエンスフェスタ要旨集  1st-  2013
• 強相関5f電子系における量子異常の研究と新規物性の探索

  網塚浩, 柳澤達也, 日高宏之, 本間佳哉, 李徳新, 田端千紘, 門別翔太, 日浦健太  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  29th-  2013
• U₃Pd₂₀Si₆の磁場中弾性応答

  日浦健太, 門別翔太, 日高宏之, 柳澤達也, 網塚浩, 立岩尚之, 芳賀芳範  日本物理学会講演概要集  68-  (1)  2013
• (Th,U)Be₁₃の磁性

  三浦植幸, 清水悠晴, 山崎聖悟, 齋藤開, 田端千紘, 門別翔太, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集  68-  (2)  2013
• 18pGA-8 Ultrasonic Measurements of URu_2Si_2 under Pulsed-Magnetic Fields

  Yanagisawa T., Mombetsu S., Hidaka H., Amitsuka H., Akatsu M., Yasin S., Zherlitsyn S., Wosnitza J., Huang K., Maple M. B.  Meeting abstracts of the Physical Society of Japan  67-  (2)  466  -466  2012/08/24
• 19pHC-15 Simultaneous Measurement of Elastic Constant and Resistivity Near the T_c of Non-BCS-type Superconductor PrOs_4Sb_<12>

  Mombetsu S., Hiura K., Hidaka H., Yanagisawa T., Amitsuka H., Maple M. B.  Meeting abstracts of the Physical Society of Japan  67-  (2)  494  -494  2012/08/24
• 25pPSB-19 Ultrasonic Measurement of SmOs_4Sb_<12> with Pulse Magnetic Field

  Mombetsu S., Yanagisawa T., Hidaka H., Amitsuka H., Akatsu M., Nemoto Y., Goto T., Yashin S., Zherlitsyn S., Wosnitza J.  Meeting abstracts of the Physical Society of Japan  67-  (1)  649  -649  2012/03/05
• 24pYB-12 Effects of Pressure on Ce_3Pd_<20>Ge_6

  Hidaka H., Otani S., Wakabayashi T., Shimizu Y., Amitsuka H., Yanagisawa T., Ramos S.M., Hering E.N., Fontes M.B., Saitovitch E.B.  Meeting abstracts of the Physical Society of Japan  67-  (1)  561  -561  2012/03/05
• 24pYB-6 Elastic Response of SmOs_4Sb_<12> under High Magnetic Field

  Yanagisawa T., Mombetsu S., Hidaka H., Amitsuka H., Akatsu M., Nemoto Y., Goto T., Yashin S., Zherlitsyn S., Wosnitza J.  Meeting abstracts of the Physical Society of Japan  67-  (1)  559  -559  2012/03/05
• 強磁性体CeAgの圧力効果

  大谷真也, 日高宏之, 清水悠晴, 五十嵐英紀, 柳澤達也, 網塚浩  日本物理学会講演概要集  67-  (1)  2012
• 単結晶構造解析によるURu₂Si₂の隠れた秩序状態の解明

  田端千紘, 三浦植幸, 安孫子和弘, 日高宏之, 柳澤達也, 横山淳, 網塚浩, 小林賢介, 熊井玲児, 中尾裕則, 村上洋一  PFシンポジウム要旨集  29th-  2012
• 23aPS-84 Acoustic de Haas-van Alphen Effect of SmOs_4Sb_<12>

  Yanagisawa T., Monbetsu S., Hidaka H., Amitsuka H., Akatsu M., Araki K., Nemoto Y., Goto T., Ho Pei-Chun, Baumbach Ryan E., Maple M. Brian  Meeting abstracts of the Physical Society of Japan  66-  (2)  596  -596  2011/08/24
• 24aGC-7 Anomalous Magnetic Properties in the Superconducting Mixed State of the Heavy-Fermion Superconductor UBe_<13>

  Shimizu Y., Ikeda Y., Haga Y., Hidaka H., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  66-  (2)  635  -635  2011/08/24
• 25aEC-5 Maki Parameter of the heavy-Fermion Superconductor UBe_<13> II

  Shimizu Y., Ikeda Y., Tenya K., Haga Y., Hidaka H., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  66-  (1)  518  -518  2011/03/03
• 強相関5f電子系化合物における量子異常の研究と新規物性の探索

  網塚浩, 本間佳哉, 李徳新, 柳澤達也, 日高宏之, 清水悠晴, 倉橋洋祐, 高橋宗佑, 齋藤旬, 田端千紘  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2010-  2011
• 重い電子系超伝導体UBe₁₃における異常な磁気特性

  清水悠晴, 池田陽一, 芳賀芳範, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集  66-  (2)  2011
• 重い電子系超伝導体UBe₁₃におけるMakiパラメーター II

  清水悠晴, 池田陽一, 天谷健一, 芳賀芳範, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集  66-  (1)  2011
• 25aWJ-7 Ultrasonic Dispersions of Filted-Skutterudite SmOs_4Sb_<12>

  Yanagisawa T., Saito H., Hidaka H., Amitsuka H., Akatsu M., Araki K., Takahashi N., Nemoto Y., Goto T., Ho Pei-Chun, Baumbach Ryan E., Maple M. Brian  Meeting abstracts of the Physical Society of Japan  65-  (2)  585  -585  2010/08/18
• 25pWJ-15 Ginzburg-Landau Parameter of the Heavy-Fermion Superconductor UBe_<13>

  Shimizu T., Ikeda Y., Tenya K., Haga Y., Hidaka H., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  65-  (2)  605  -605  2010/08/18
• 21pGF-6 Thermodynamic Properties of the Heavy-Fermion Superconductor UBe_<13>

  Shimizu Y., Ikeda Y., Wakabayashi T., Tenya K., Haga Y., Hidaka H., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  65-  (1)  631  -631  2010/03/01
• 21aPS-31 Ultrasonic Measurement of LaRu_4Sb_<12>

  Yanagisawa T., Hidaka H., Amitsuka H., Cichorek T., Henkie Z., Maple M. B.  Meeting abstracts of the Physical Society of Japan  65-  (1)  608  -608  2010/03/01
• 強相関5f電子系化合物における量子異常の研究と新規物性の探索

  網塚浩, 柳澤達也, 日高宏之, 池田陽一, 清水悠晴, 西川大地, 田中淳, 真山太一, 横山淳, 芳賀芳範, 本間佳哉  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2009-  2010
• 重い電子系超伝導体UBe₁₃における基礎物性測定

  清水悠晴, 池田陽一, 若林琢巳, 天谷健一, 芳賀芳範, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集  65-  (1)  2010
• 25pRG-10 Pressure Effect on EuIn_2P_2

  Hidaka H., Tanaka A., Ikeda Y., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  64-  (2)  449  -449  2009/08/18
• 25aPS-49 Single site effects in La-diluted clathrate system of R_3Pd_<20>Ge_6(R=Ce, Pr)

  Wakabayashi T., Hidaka H., Yanagisawa T., Yokoyama M., Tenya K., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  64-  (2)  427  -427  2009/08/18
• 26aRL-11 Ultrasonic Measurement of Ratting in Pr_<1-x>Nd_xOs_4Sb_<12>

  Yanagisawa T., Saito H., Mayama T., Ikeda Y., Hidaka H., Amitsuka H., Nemoto Y., Goto T., Takeda N., Ho P. -C., Maple M. B.  Meeting abstracts of the Physical Society of Japan  64-  (2)  475  -475  2009/08/18
• 27pTJ-5 Ultrasonic Measurement of Clathrate Compound U_3Pd_<20>Si_6

  Mayama T., Yanagisawa T., Satio H., Hidaka H., Amitsuka H., Tateiwa N., Haga Y.  Meeting abstracts of the Physical Society of Japan  64-  (2)  554  -554  2009/08/18
• 27pTJ-1 Thermal Equilibrium Magnetization Measurement in the Superconducting Mixed State of the Heavy-Fermion Superconductor UBe_<13>

  Shimizu Y., Ikeda Y., Tenya K., Haga Y., Hidaka H., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  64-  (2)  553  -553  2009/08/18
• 27aPS-36 Magnetic Clustering and Non-Fermi-Liquid Behavior Accompanying Suppression of Long-Range Ferromagnetic Order in CePt_<1-x>Rh_x

  Kawasaki I., Hidaka H., Yanagisawa T., Yokoyama M., Tenya K., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  64-  (1)  539  -539  2009/03/03
• 27aPS-87 Structure analysis of Pr_3Pd_<20>Ge_6 in low temperature and magnetic field

  Wakabayashi T., Kawasaki I., Hidaka H., Amitsuka H., Yanagisawa T., Yokoyama M., Tenya K.  Meeting abstracts of the Physical Society of Japan  64-  (1)  551  -551  2009/03/03
• Pr₃Pd₂₀Ge₆の低温磁場中構造解析

  若林琢巳, 川崎郁斗, 日高宏之, 網塚浩, 柳澤達也, 横山淳, 天谷健一  日本物理学会講演概要集  64-  (1)  2009
• 重い電子系超伝導体UBe₁₃における超伝導熱平衡磁化測定

  清水悠晴, 池田陽一, 天谷健一, 芳賀芳範, 日高宏之, 柳澤達也, 網塚浩  日本物理学会講演概要集  64-  (2)  2009
• 22pQC-12 Magnetic properties and ferromagnetic quantum critical behavior of CePt_<1-x>Rh_x

  Kawasaki I., Nishikawa D., Hidaka H., Yanagisawa T., Yokoyama M., Tenya K., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  63-  (2)  555  -555  2008/08/25
• 21aPS-50 Specific heat of EuIn_2P_2 at high magnetic fields

  Hidaka H., Ikeda Y., Kawasaki I., Yanagisawa T., Amitsuka H.  Meeting abstracts of the Physical Society of Japan  63-  (2)  504  -504  2008/08/25
• 21aPS-11 Ultrasonic Dispersion in the Filled-Skutterudite Pr_<0.55>Nd<0.45>Os_4Sb_<12>

  Yanagisawa T., Mayama T., Morishita A., Hidaka H., Amitsuka H., Yamaguchi A., Nemoto Y., Goto T., Takeda N., Ho Pei-Chun, Maple M. Brian  Meeting abstracts of the Physical Society of Japan  63-  (2)  495  -495  2008/08/25
• 21aPS-57 Field Induce Phase Transition on Clathrate Compound Pr_3Pd_<20>Ge_6 II

  Wakabayashi T., Kawasaki I., Morishita A., Hidaka H., Amitsuka H., Yanagisawa T., Yokoyama M., Tenya K.  Meeting abstracts of the Physical Society of Japan  63-  (2)  506  -506  2008/08/25
• 23pPSA-18 Unusual ordered state under pressures in SmOs_4Sb_<12>

  Tabira K., Hidaka H., Kotegawa H., Kobayasi T.C., Kikuchi D., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  63-  (1)  539  -539  2008/02/29
• 23pPSA-43 Pressure effect of CePtZn

  Toda Y., Hidaka H., Kotegawa H., Kobayashi T.C., Dhar S.K., Kulkarni R., Manfrinetti P.  Meeting abstracts of the Physical Society of Japan  63-  (1)  545  -545  2008/02/29
• 極低温磁化測定用高圧セルの開発

  清水悠晴, 日高宏之, 西川大地, 川崎郁斗, 柳澤達也, 網塚浩, 天谷健一, 芳賀芳範, 大貫惇睦, 大貫惇睦  日本物理学会講演概要集  63-  (2)  2008
• 21aXA-1 Electrical resistivity and AC-susceptibility measurements on Pr(Fe_<0.95>Ru_<0.05>)_4P_<12> under high pressure

  Hidaka H., Toda Y., Kotegawa H., Kobayashi T. C., Motomura Y., Aoki Y., Kikuchi D., Sato H.  Meeting abstracts of the Physical Society of Japan  62-  (2)  513  -513  2007/08/21
• 21pPSB-10 Magnetization and specific heat measurements at high pressures in SmOs_4Sb_<12>

  Tabira K., Hidaka H., Kotegawa H., Kobayasi T. C., Kikuti D., Tanaka K., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  62-  (2)  574  -574  2007/08/21
• 22pXA-14 Relationship between pressure-induced 1st order phase transition and superconductivity

  Kotegawa E., Hori A., Irie Y., Hidaka H., Kobayashi T. C., Akazawa T., Yamamoto E., Ikeda S., Haga Y., Onuki Y.  Meeting abstracts of the Physical Society of Japan  62-  (2)  617  -617  2007/08/21
• 18pPSB-6 Anomalous enhancement of residual resistivity in pressure-induced superconductor UIr

  Hori A., Hidaka H., Kotegawa H., Kobayashi T. C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.  Meeting abstracts of the Physical Society of Japan  62-  (1)  529  -529  2007/02/28
• 18pPSB-7 Coexistence of ferromagnetism and superconductivity in UIr : AC-susceptibility measurement under high pressure

  Fukushima S., Kotegawa H., Hidaka H., Kobayashi T.C., Akazawa T., Yamamoto E., Ikeda S., Haga Y., Onuki Y.  Meeting abstracts of the Physical Society of Japan  62-  (1)  529  -529  2007/02/28
• 18pPSB-5 Pressure dependence of Electrical Resistivity in UIr

  Akazawa T., Hidaka H., Kotegawa H., Fukushima S., Hori A., Kobayashi T. C., Yamamoto E., Haga Y., Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  62-  (1)  528  -528  2007/02/28
• 20pWP-13 Superconducting Phase-Diagram under Pressure in CeRh_<1-x>Ir_xIn_5

  Wada N., Kotegawa H., Fukushima S., Hidaka H., Kobayashi T. C., Shishido H., Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  62-  (1)  634  -634  2007/02/28
• 21aWK-2 ^<121,123>Sb-NQR study in SmOs_4Sb_<12>

  Kotegawa H., Hidaka H., Irie Y., Kobayashi T. C., Kikuchi D., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  62-  (1)  643  -643  2007/02/28
• 24pYA-3 Pressure-induced superconductivity in a ferromagnet UIr

  Kobayashi T.C., Hori A., Fukushima S., Hidaka H., Kotegawa H., Akazawa T., Settai R., Ikeda S., Yamamoto E., Haga Y., Onuki Y.  Meeting abstracts of the Physical Society of Japan  61-  (2)  465  -465  2006/08/18
• 25aYA-3 A study of the pressure-induced insulating phase on PrFe_4P_<12>

  Hidaka H., Wada N., Kotegawa H., Kobayashi T.C., Kikuchi D., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  61-  (2)  482  -482  2006/08/18
• 25pYA-1 ^<121,123>Sb-NMR/NQR study in SmOs_4Sb_<12>

  Kotegawa H., Hidaka H., Kobayashi T.C., Kikuchi D., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  61-  (2)  497  -497  2006/08/18
• 23pPSA-52 Superconducting Phase-Diagram under Pressure in CeRh_<1-x>Ir_xIn_5

  Wada N., Kotegawa H., Hidaka H., Kobayashi T.C., Shishido H., Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  61-  (2)  418  -418  2006/08/18
• 27aUB-5 Sb-NQR study in SmOs_4Sb_<12>

  Kotegawa H., Hidaka H., Kobayashi T.C., Kikuchi D., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  61-  (1)  512  -512  2006/03/04
• 27aPS-7 Coexistence of ferromagnetism and superconductivity in UIr : AC-susceptibility measurement under high pressure

  Fukushima S., Kotegawa H., Hidaka H., Kobayashi T.C., Akazawa T., Ikeda S., Yamamoto E., Haga Y., Onuki Y.  Meeting abstracts of the Physical Society of Japan  61-  (1)  521  -521  2006/03/04
• 29pPSA-51 Abnormal increase of residual resistivity in multi-ferromagnet UIr

  Hori A., Hidaka H., Kotegawa H., Kobayashi T.C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.  Meeting abstracts of the Physical Society of Japan  61-  (1)  640  -640  2006/03/04
• 29pRA-13 Pressure effect of CeNiGe_3 and CeNi_2Ge_2

  Miyoshi T., Takeda K., Fukushima S., Hidaka H., Kotegawa H., Kobayashi T.C., Nakashima M., Thamizhavel A., Settai R., Onuki Y., Kawasaki S., Kitaoka Y., Fukuhara T., Maezawa K., Itoh K.  Meeting abstracts of the Physical Society of Japan  61-  (1)  614  -614  2006/03/04
• 22aXD-9 Coexistence of ferromagnetism and superconductivity In UIr : AC-susceptibility measurement under high pressure

  Fukushima S., Kotegawa H., Hidaka H., Kobayashi T. C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.  Meeting abstracts of the Physical Society of Japan  60-  (2)  500  -500  2005/08/19
• 22aXD-8 Anisotropy on electrical conduction for multi-ferromagnetic phases under high pressure In UIr

  Hori A., Hidaka H., Kotegawa H., Kobayashi T. C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.  Meeting abstracts of the Physical Society of Japan  60-  (2)  500  -500  2005/08/19
• 22aYG-7 A study of the pressure-induced insulating phase in PrFe_4P_<12>

  Hidaka H., Fukushima S., Hori A., Kotegawa H., Kobayashi T. C., Fujiwara K., Kikuchi D., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  60-  (2)  503  -503  2005/08/19
• 20aYG-3 Superconductivity in antifferomagnetic state of CeNiGe_3

  Miyoshi T., Takeda K., Fukushima S., Hidaka H., Kotegawa H., Kobayashi T., Tabata K., Nakashima M., Thamizhavel A., Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  60-  (2)  420  -420  2005/08/19
• 19pPSA-81 Study of erectrical resistivity anormalies and Fermi surface of RAgSb_2(R=Ce, La)

  Watanabe Y., Inada Y., Nogami Y., Hidaka H., Kotegawa H., Kobayashi T. C.  Meeting abstracts of the Physical Society of Japan  60-  (2)  413  -413  2005/08/19
• 25pTA-11 ^<31>P-NMR Study on Pressure Induced Insulating State in PrFe_4P_<12>

  Kotegawa H., Shimaoka Y., Hidaka H., Miki T., Kobayashi T., Fujiwara K., Kikuchi D., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  60-  (1)  551  -551  2005/03/04
• 25aPS-8 AC-Susceptlbility on Ferromagnetic Superconductor UIr without Inversion Symmetry

  Fukushima S., Kotegawa H., Hidaka H., Kobayashi T.C., Akazawa T., Ikeda S., Haga Y., Yamamoto E., Onuki Y.  Meeting abstracts of the Physical Society of Japan  60-  (1)  524  -524  2005/03/04
• 25aPS-7 Powder X-ray Diffraction Study on UIr under Quasi-Hydrostatic Pressure

  Akazawa T., Hidaka H., Takeda K., Kotegawa H., Fukushima S., Hori A., Kobayashi T. C., Ohishi Y., Yamamoto E., Haga Y., Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  60-  (1)  523  -523  2005/03/04
• 25aPS-63 Anisotropy on RAgSb_2(R=Ce,La)

  Watanabe Y., Inada Y., Hidaka H., Kotegawa H., Kobayashi T.C., Matsuda T.D., Aoki D.  Meeting abstracts of the Physical Society of Japan  60-  (1)  537  -537  2005/03/04
• 25aPS-9 Anisotropy on electrical conduction under high pressure in UIr

  Hori A., Hidaka H., Kotegawa H., Kobayashi T. C., Akazawa T., IkedaS., Haga Y., Yamamoto E., Onuki Y.  Meeting abstracts of the Physical Society of Japan  60-  (1)  524  -524  2005/03/04
• 25aPS-27 Hall effect in the pressure-induced insulating state of PrFe_4P_<12>

  Hidaka H., Hori A., Kotegawa H., Kobayashi T. C., Harima H., Kikuchi D., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  60-  (1)  528  -528  2005/03/04
• 24aTA-2 Pressure dependence of the unit cell volume in CeCu_2Ge_2 at low temperature

  Takeda K., Kobayashi C., Hidaka H., Shimizu K., Adachi T., Ohishi Y., Takata M., Watanuki T., Shimomura S., Onuki Y.  Meeting abstracts of the Physical Society of Japan  60-  (1)  484  -484  2005/03/04
• 24aTA-4 Pressure-induced superconductivity in CeNiGe_3

  Thamizhavel A.  Meeting abstracts of the Physical Society of Japan  60-  (1)  484  -484  2005/03/04
• 15aRD-5 Magnetization measurement of UIr under high pressure

  Hidaka H, Akazawa T, Kotegawa H, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y  Meeting abstracts of the Physical Society of Japan  59-  (2)  576  -576  2004/08/25
• 15aRD-4 Superconductivity around a ferromagnetic quantum critical point in UIr without inversion symmetry

  Akazawa T, Hidaka H, Kotegawa H, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y  Meeting abstracts of the Physical Society of Japan  59-  (2)  576  -576  2004/08/25
• 14pPSA-74 Pressure effect on SmOs_4Sb_12

  Kotegawa H, Miki T, Hidaka H, Kobayashi T C, Kikuchi D, Sugawara H, Sato H  Meeting abstracts of the Physical Society of Japan  59-  (2)  561  -561  2004/08/25
• 14pPSA-59 Pressure-induced metal-insulator transition in PrFe_4P_<12> II

  Hidaka H, Hori A, Kotegawa H, Kobayashi T C, Harima H, Kobayashi M, Sugawara H, Sato H  Meeting abstracts of the Physical Society of Japan  59-  (2)  558  -558  2004/08/25
• 14pPSA-35 AC-Susceptibility on Ferromagnetic Superconductor Ulr without inversion Symmetry

  Kotegawa H, Fukushima S, Hidaka H, Kobayashi T C, Akazawa T, Haga Y, Yamamoto E, Onuki Y  Meeting abstracts of the Physical Society of Japan  59-  (2)  552  -552  2004/08/25
• 28pPSA-34 Pressure-induced metal-insulator transition in the filled skutterudite PrFe_4P_<12>

  Hidaka H, Kotegawa H., Kobayashi T. C., Ando I., Harima H., Kobayashi M., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  59-  (1)  610  -610  2004/03/03
• 28aXD-13 Pressure Induced Superconductivity in UIr without inversion symmetry

  Akazawa T, Hidaka H, Fujiwara T, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y  Meeting abstracts of the Physical Society of Japan  59-  (1)  553  -553  2004/03/03
• 28aXD-12 Magnetization measurement of UIr under high preasure

  Hidaka H., Akazawa T., Kobayashi T. C., Yamamoto E., Haga Y, Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  59-  (1)  552  -552  2004/03/03
• Magnetic Mesurement of PrFe_4P_<12> under High Pressure

  Hidaka H., Ando I., Tabata K., Shimizu K., Kobayashi T. C., Harima H., Kobayashi M., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  58-  (2)  458  -458  2003/08/15
• Electrical Resistivity Mesurements of Filled Skutterudite PrFe_4P_<12> under high pressure

  Ando I., Tabata K., Kobayashi T. C., Hidaka H., Harima H., Kobayashi M., Sugawara H., Sato H.  Meeting abstracts of the Physical Society of Japan  58-  (2)  458  -458  2003/08/15
• Pressure-induced charge-ordering in LiV_2O_4 II

  Takeda K., Hidaka H., Kobayashi T. C., Shimizu K., Miyoshi K., Fujiwara K., Takeuchi J., Nishibori E., Takata M., Sakata M., Adachi T., Ohishi Y., Watanuki T., Shimomura O.  Meeting abstracts of the Physical Society of Japan  58-  (2)  543  -543  2003/08/15
• Phase Diagram of UIr under Quasi-Hydrostatic Pressure

  Akazawa T., Hidaka H., Tabata K., Kobayashi T. C., Yamamoto E., Haga Y., Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  58-  (2)  541  -541  2003/08/15
• Powder X-ray diffractions under low temperature and high pressure for pressure-induced superconductors in Ce compounds

  Takeda K., Adachi T., Kobayashi C., Shimizu K., Hidaka H., Takao D., Nishibori E., Takata M., Sakata M., Ohishi Y., Watanuki T., Shimomura O., Onuki Y.  Meeting abstracts of the Physical Society of Japan  58-  (1)  565  -565  2003/03/06
• Pressure Dependence of the Magnetization in the Itinerant Ferromagnet Ulr

  Hidaka H., Kobayashi T. C., Yamamoto E., Haga Y., Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  58-  (1)  568  -568  2003/03/06
• Electrical resistance measurement in BaVS3 under pressure

  Hidaka H, Kobayashi T.C, Yamasaki T, Nakamura H, Shiga M  Meeting abstracts of the Physical Society of Japan  57-  (2)  454  -454  2002/08/13
• 27aYK-2 Pressure-induced charge-ordering in LiV_2O_4

  Takeda K., Shimizu K., Ishikawa H., Tanaka M., Furomoto S., Hidaka H., Takao D., Kobayashi T. C., Miyoshi K., Fujiwara K., Takeuchi J., Nishibori E., Takata M., Sakata M., Ohishi Y., Watanuki T., Shimomura O.  Meeting abstracts of the Physical Society of Japan  57-  (1)  585  -585  2002/03/01
• Physical Properties in CeCoIn_5 under pressure

  Nakawaki H., Shishido H., Hidaka H., Fujiwara T., Akazawa T., Kobayashi T., Settai R., Onuki Y.  Meeting abstracts of the Physical Society of Japan  56-  (2)  478  -478  2001/09/03

Presentations

• Determination of Magnetic Structure of UIr₂Ge₂ by Resonant X-Ray Scattering

  今布咲子, 鈴木悠介, 高力暁成, 村田怜也, 金子佑真, 日高宏之, 柳澤達也, 田端千紘, 中尾裕則, 清水悠晴, 青木大, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2021
• Observation of the lattice distortion in CeCoSi by linear thermal expansion measurements under magnetic field

  早坂英海, 日高宏之, 金子佑真, 柳谷駿, 柳澤達也, 網塚浩, 谷田博司

  日本物理学会講演概要集(CD-ROM)  2021
• Magnetic symmetry of antiferromagnetic metal CeRh₂Si₂ investigated by magnetization under uniaxial pressure

  齋藤開, 今布咲子, 日高宏之, 網塚浩, 中島多朗, 中島多朗

  日本物理学会講演概要集(CD-ROM)  2021
• Ultrasonic Investigation of Dynamical Elastic Response in Single Crystalline Cd₂Re₂O₇

  三上義人, 柳澤達也, 日比野瑠央, 日高宏之, 網塚浩, 平井大悟郎, 廣井善二

  日本物理学会講演概要集(CD-ROM)  2020
• Observation of the lattice distortion in Cd₂Re₂O₇ by thermal expansion measurements under magnetic field

  金子佑真, 日高宏之, 村田怜也, 柳澤達也, 網塚浩, 田島聖士, 平井大悟郎, 廣井善二

  日本物理学会講演概要集(CD-ROM)  2020
• Elastic Response in Non-Kramers Compound Y_1-xPr_x Ir₂Zn₂₀

  日比野瑠央, 柳澤達也, 三上義人, 日高宏之, 網塚浩, ZHERLITSYN Sergei, WOSNITZA Joachim, WOSNITZA Joachim, 山根悠, 鬼丸孝博

  日本物理学会講演概要集(CD-ROM)  2020
• Search for the symmetry lowering in crystal and magnetic structure of an antiferromagnetic metal CeRh₂Si₂

  齋藤開, 羽合孝文, 今布咲子, 日高宏之, 網塚浩, 益田隆嗣, 益田隆嗣, CHO Kwanghee, 鳥居周輝, 鳥居周輝, 萩原雅人, 萩原雅人, 神山崇, 神山崇, 横尾哲也, 横尾哲也, 中島多朗, 中島多朗, 伊藤晋一, 伊藤晋一

  日本物理学会講演概要集(CD-ROM)  2020
• Resonant X-Ray Scattering Study on Antiferromagnetic Order of UNi₄B

  村田怜也, 今布咲子, 金子佑真, 田端千紘, 中尾裕則, 齋藤開, 清水悠晴, 青木大, 日高宏之, 柳澤達也, 網塚浩

  KEK Progress Report (Web)  2020
• Resonant X-Ray Scattering Study on Magnetic Structure of UIr₂Ge₂

  今布咲子, 鈴木悠介, 高力暁成, 村田怜也, 金子佑真, 日高宏之, 柳澤達也, 田端千紘, 中尾裕則, 清水悠晴, 青木大, 網塚浩

  KEK Progress Report (Web)  2020
• Resonant X-Ray Scattering Study of Magnetic Structure in UIr₂Ge₂

  今布咲子, 鈴木悠介, 高力暁成, 山本将隆, 村田怜也, 金子佑真, 日高宏之, 柳澤達也, 田端千紘, 中尾裕則, 清水悠晴, 本間佳哉, 本多史憲, LI Dexin, 仲村愛, 青木大, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2020
• Thermal Expansion in Cd₂Re₂O₇

  日高宏之, 金子佑真, 村田怜也, 柳澤達也, 網塚浩, 田島聖士, 平井大悟郎, 廣井善二

  日本物理学会講演概要集(CD-ROM)  2020
• Transverse Ultrasonic Measurements on Single Crystal Cd₂Re₂O₇

  三上義人, 柳澤達也, 日比野瑠央, 日高宏之, 網塚浩, 平井大悟郎, 廣井善二

  日本物理学会講演概要集(CD-ROM)  2020
• Resonant X-ray Scattering Study of UNi₄B: II

  村田怜也, 今布咲子, 金子佑真, 田端千紘, 中尾裕則, 齋藤開, 清水悠晴, 青木大, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2020
• The anisotropy of magnetic excitations on antiferromagnetic metal CeRh₂Si₂

  齋藤開, 齋藤開, 羽合孝文, 今布咲子, 日高宏之, 網塚浩, 益田隆嗣, 益田隆嗣, 横尾哲也, 横尾哲也, 伊藤晋一, 伊藤晋一

  日本物理学会講演概要集(CD-ROM)  2020
• Corroborating Evidence for the Single-Site Quadrupolar Kondo Effect: Elastic Response ofY_1-xPr_xIr₂Zn₂₀ (Part II)

  柳澤達也, 日比野瑠央, 日高宏之, 網塚浩, ZHERLITSYN Sergei, WOSNITZA Joachim, WOSNITZA Joachim, 山根悠, 鬼丸孝博

  日本物理学会講演概要集(CD-ROM)  2020
• 立方晶Pr化合物の内殻光電子線二色性による4f軌道対称性の決定

  浜本諭, 浜本諭, 中田惟奈, 中田惟奈, 久我健太郎, 藤原秀紀, 藤原秀紀, 木須孝幸, 木須孝幸, 東谷篤志, 東谷篤志, 山崎篤志, 山崎篤志, 今田真, 今田真, 田中新, 玉作賢治, 矢橋牧名, 石川哲也, 日高宏之, 柳澤達也, 網塚浩, 松本圭介, 鬼丸孝博, 高畠敏郎, 関山明, 関山明

  日本放射光学会年会・放射光科学合同シンポジウム(Web)  2020
• Th1-xUxBe13における静水圧効果  [Not invited]

  日高宏之, 水内康太, 瀬口泰生, 三浦植幸, 柳澤達也, 網塚浩

  第60回高圧討論会  2019/10
• Helical Magnetic Ordering in Single Crystalline GdBe13  [Not invited]

  Hiroyuki Hidaka, Kota Mizuuchi, Tatsuya Yanagisawa, Hiroshi Amitsuka

  International Conference on Strongly Correlated Electron Systems 2019 (SCES '19)  2019/09
• Helical Magnetic Ordering of GdBe13  [Not invited]

  H. Hidaka, K. Mizuuchi, T. Yanagisawa, H. Amitsuka, J. Ohara

  J-Physics 2019 International Conference & KINKEN-WAKATE 2019 Multipole Physics  2019/09
• 単結晶 GdBe 13 のヘリカル磁性  [Not invited]

  日高 宏之

  J-Physics 地域研究会 - 札幌  2019/07
• Electronic and Phonon Properties of Rare-Earth Beryllides RBe13  [Not invited]

  Hiroyuki Hidaka, Seigo Yamazaki, Ryoma Nagata, Kota Mizuuchi, Naoyuki Miura, Shota Mombetsu, Chihiro Tabata, Yusei Shimizu, Tatsuya Yanagisawa, Hiroshi Amitsuka

  5th International Symposium on Current Progress in Mathematics and Sciences 2019  2019/07
• UAu₂Si₂の強磁場に於ける弾性特性  [Not invited]

  柳澤達也, 日高宏之, 網塚浩, 齋藤開, 田端千紘, GORBUNOV D, 野村肇宏, ZHERLITSYN S, WOSNITZA J, UHLIROVA K, VALISKA M, SECHOVSKY V

  日本物理学会講演概要集(CD-ROM)  2019/03
• TbNiC₂における負の磁気応答の観測  [Not invited]

  山本将隆, 日高宏之, 柳澤達也, 田端千紘, 中尾裕則, 下村晋, 小野寺秀也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2019/03
• CeRu₂Al₁₀における電流誘起磁化  [Not invited]

  高力暁成, 山本将隆, 鹿内奈南, 齋藤開, 田端千紘, 日高宏之, 柳澤達也, 網塚浩, 谷田博司, 松村武, 世良正文

  日本物理学会講演概要集(CD-ROM)  2019/03
• RBe₁₃(R:軽希土類)のX線非弾性散乱  [Not invited]

  筒井智嗣, 清水悠晴, 日高宏之, 長谷川巧, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2019/03
• EuBe₁₃におけるEu価数状態と低エネルギーフォノン  [Not invited]

  日高宏之, 水内康太, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2019/03
• 金属反強磁性体CeRh₂Si₂の磁気励起  [Not invited]

  齋藤開, 横尾哲也, 羽合孝文, 益田隆嗣, 今布咲子, 日高宏之, 網塚浩, 伊藤晋一

  日本物理学会講演概要集(CD-ROM)  2019/03
• Effects of Hydrostatic Pressure on Th_1-xU_xBe₁₃ (0 < x < 1)  [Not invited]

  Hidaka Hiroyuki, Miura Naoyuki, Seguchi Taisei, Yanagisawa Tatsuya, Amitsuka Hiroshi

  Meeting Abstracts of the Physical Society of Japan  2019  一般社団法人 日本物理学会
   

  <p>UBe_13_における非フェルミ流体異常の起源を探るために、Th置換系の研究を最近我々のグループで行っている。本公演ではいくつかのU濃度試料における高圧下電気抵抗測定の結果を紹介し、低温金属状態に対する置換効果と圧力効果の違いについて議論する予定である。</p>
• 単サイト四極子近藤効果の傍証:Y_1-xPr_xIr₂Zn₂₀の弾性応答

  柳澤達也, 日高宏之, 網塚浩, ZHERLITSYN Sergei, WOSNITZA Joachim, WOSNITZA Joachim, 山根悠, 鬼丸孝博

  日本物理学会講演概要集(CD-ROM)  2019
• CeRu₂Al₁₀における電流誘起磁化とその解釈

  高力暁成, 山本将隆, 鹿内奈南, 齋藤開, 田端千紘, 日高宏之, 柳澤達也, 網塚浩, 谷田博司, 松村武, 世良正文

  日本物理学会講演概要集(CD-ROM)  2019
• 金属反強磁性体CeRh₂Si₂の磁気励起 II

  齋藤開, 羽合孝文, 今布咲子, 日高宏之, 網塚浩, 益田隆嗣, 横尾哲也, 伊藤晋一

  日本物理学会講演概要集(CD-ROM)  2019
• GdBe₁₃のヘリカル磁気秩序

  日高宏之, 水内康太, 柳澤達也, 網塚浩, 大原潤

  日本物理学会講演概要集(CD-ROM)  2019
• 単結晶UIr₂Ge₂試料の低温における電気的性質と磁性

  今布咲子, 鈴木悠介, 高力暁成, 山本将隆, 村田怜也, 日高宏之, 柳澤達也, 田端千紘, 中尾裕則, 清水悠晴, 本間佳哉, 本多史憲, LI Dexin, 仲村愛, 青木大, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2019
• 籠状構造を有するRBe₁₃のNMRによる研究 II

  與儀護, 水内康太, 日高宏之, 清水悠晴, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2019
• 共鳴X線散乱実験によるUNi₄Bの研究

  村田怜也, 今布咲子, 田端千紘, 中尾裕則, 齋藤開, 清水悠晴, 青木大, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2019
• Trivalent State of Europium and Low-Energy Phonon Mode in EuBe13  [Not invited]

  Hiroyuki Hidaka

  J-Physics: Tropical Topical Meeting  2018/12
• カゴ状化合物MBe₁₃における低励起フォノンとf電子状態  [Not invited]

  日高宏之, 山崎聖悟, 永田涼馬, 水内康太, 三浦植幸, 門別翔太, 田端千紘, 清水悠晴, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2018/09
• Ce(Ru_1-xRh_x)₂Al₁₀(x=0,0.05)における電流誘起磁化  [Not invited]

  高力暁成, 山本将隆, 鹿内奈南, 齋藤開, 田端千紘, 日高宏之, 柳澤達也, 網塚浩, 谷田博司, 松村武, 世良正文

  日本物理学会講演概要集(CD-ROM)  2018/09
• 静水圧下における超音波測定によるCeTeの四極子応答の研究  [Not invited]

  斎藤猛敬, 松盛泰明, 日高宏之, 柳澤達也, 網塚浩, 林佑弥, 松村武, 中村慎太郎, 落合明

  日本物理学会講演概要集(CD-ROM)  2018/09
• 9Be NMR Study of Magnetic Structure in Single Crystalline SmBe13  [Not invited]

  H. Hidaka, Y. Ihara, S. Yamazaki, N. Miura, T. Yanagisawa, H. Amitsuka

  International Conference on Magnetism 2018  2018/07
• Low-energy phonon and f electronic state in the cage-structured compound MBe13  [Not invited]

  Hiroyuki Hidaka

  J-Physics2018: International Workshop on New Materials and Crystal Growth  2018/06
• Low-energy phonon and f electronic state in the cage-structured compound MBe13  [Invited]

  Hiroyuki Hidaka

  J-Physics2018 Summer School  2018/06
• UNi₄Bのトロイダル秩序における強磁場弾性応答  [Not invited]

  柳澤達也, 齋藤開, 日高宏之, 網塚浩, 中村慎太郎, 淡路智

  東北大学金属材料研究所強磁場超伝導材料研究センター年次報告  2018/06
• MBe13系における低温X線結晶構造解析  [Not invited]

  日高 宏之

  J-Physic: 多極子伝導系の物理 平成30年度領域全体会議（後半キックオフミーティング）  2018/05
• 非磁性Eu化合物EuBe₁₃のNMRによる研究  [Not invited]

  比嘉野乃花, 久保田史洋, 上原弘敬, 與儀護, 水内康太, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2018/03
• UNi₄Bの極低温・強磁場における超音波弾性応答  [Not invited]

  柳澤達也, 齋藤開, 日高宏之, 網塚浩, 中村慎太郎, 淡路智, GORBUNOV Denis, ZHERLITSYN Sergei, WOSNITZA Jochen, UHLIROVA Klara, VALISKA Michal, SECHOVSKY Vladimir

  日本物理学会講演概要集(CD-ROM)  2018/03
• 局所空間反転対称性の破れたCe(Ru_1-xRh_x)₂Al₁₀における電気磁気効果 II  [Not invited]

  鹿内奈南, 網塚浩, 齋藤開, 山本将隆, 日高宏之, 柳澤達也, 谷田博司, 松村武, 世良正文

  日本物理学会講演概要集(CD-ROM)  2018/03
• 金属反強磁性体CeRh₂Si₂における電流誘起磁化現象  [Not invited]

  齋藤開, 鈴木悠介, 鹿内奈南, 三浦植幸, 日高宏之, 柳澤達也, 田端千紘, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2018/03
• ⁹Be NMR測定によるSmBe₁₃の磁気構造の研究 II  [Not invited]

  日高宏之, 井原慶彦, 山崎聖悟, 三浦植幸, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2018/03
• 局所空間反転対称性の破れたSmBe13の磁気構造に関する研究  [Not invited]

  日高 宏之

  J-Physic: 多極子伝導系の物理 平成29年度領域全体会議  2018/03
• 籠状化合物RBe13 の低温物性  [Invited]

  日高 宏之

  平成29 年度科学研究費補助金基盤研究(C)＋国際共同研究加速基金 研究会 「反転対称無き系における多極子応答」  2018/01
• TbNiC₂における磁化反転異常

  山本将隆, 日高宏之, 柳澤達也, 田端千紘, 中尾裕則, 下村晋, 小野寺秀也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2018
• UAu₂Si₂の強磁場に於ける弾性特性

  柳澤達也, 日高宏之, 網塚浩, 齋藤開, 田端千紘, GORBUNOV D., 野村肇宏, ZHERLITSYN S., WOSNITZA J., UHLIROVA K., VALISKA M., SECHOVSKY V.

  日本物理学会講演概要集(CD-ROM)  2018
• 籠状構造を有するRBe₁₃のNMRによる研究

  與儀護, 久保田史洋, 比嘉野乃花, 上原弘敬, 水内康太, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2018
• Crossover between Fermi-liquid and non-Fermi-liquid states in Th1-xUxBe13  [Not invited]

  Hiroyuki Hidaka

  Physics of Uranium based Unconventional Superconductors (J-Physics satellite)  2017/09
• Systematic Study of the 4f Electronic State and Low-Energy Phonon in the Light-Rare-Earth RBe13  [Not invited]

  Hiroyuki Hidaka

  J-Physics 2017: International Workshop on Multipole Physics and Related Phenomena  2017/09
• 局所空間反転対称性の破れたCe(Ru_1-xRh_x)₂Al₁₀における電気磁気効果  [Not invited]

  鹿内奈南, 齋藤開, 日高宏之, 柳澤達也, 網塚浩, 谷田博司, 松村武, 世良正文

  日本物理学会講演概要集(CD-ROM)  2017/09
• 磁場中超音波測定によるCeTeの四極子応答の研究  [Not invited]

  斎藤猛敬, 松盛泰明, 日高宏之, 柳澤達也, 網塚浩, 林佑弥, 松村武, 落合明

  日本物理学会講演概要集(CD-ROM)  2017/09
• URu₂Si₂の隠れた秩序における4回回転対称性の検証  [Not invited]

  立松愛梨, 日高宏之, 柳澤達也, 網塚浩, 仲村愛, 本間佳哉, 本多史憲, 青木大

  日本物理学会講演概要集(CD-ROM)  2017/09
• 軽希土類系RBe₁₃における4f電子状態と低励起フォノンに関する系統的研究  [Not invited]

  日高宏之, 山崎聖悟, 永田涼馬, 水内康太, 三浦植幸, 門別翔太, 田端千紘, 清水悠晴, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2017/09
• UNi₄Bのトロイダル磁気秩序における電流下超音波測定  [Not invited]

  柳澤達也, 松盛泰明, 斎藤猛敬, 齋藤開, 日高宏之, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2017/09
• Crossover between Fermi-liquid and non-Fermi-liquid states in Th1-xUxBe13  [Invited]

  Hiroyuki Hidaka

  The XVI Brazilian MRS Meeting  2017/09
• Electronic and magnetic properties of cage-structural compound RBe13 (R = Eu and Gd)  [Not invited]

  Hiroyuki Hidaka

  International Conference on Strongly Correlated Electron Systems 2017  2017/07
• 非クラマース2重項基底を持つPrNi₂Cd₂₀の四極子感受率と音響dHvA効果  [Not invited]

  柳澤達也, 日高宏之, 網塚浩, 中村慎太郎, 淡路智, YAZICI D, WHITE B. D, MAPLE M. B, CONG P. T, ZHERLITSYN S, WOSNITZA J

  東北大学金属材料研究所強磁場超伝導材料研究センター年次報告  2017/06
• UNi₄Bのトロイダル磁気秩序における磁場中超音波弾性応答 II  [Not invited]

  松盛泰明, 門別翔太, 齋藤開, 柳澤達也, 日高宏之, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2017/03
• ⁹Be NMR測定によるSmBe₁₃の磁気構造の研究  [Not invited]

  井原慶彦, 大沼晃弘, 山崎聖悟, 三浦植幸, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2017/03
• UAu₂Si₂の磁気構造解析  [Not invited]

  田端千紘, KLICPERA Milan, KLICPERA Milan, OULADDIAF Bachir, 齋藤開, VALISKA Michal, UHLIROVA Klara, SECHOVSKY Vladimir, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2017/03
• UNi₄Bの単結晶育成及び電流下磁化の試料依存性  [Not invited]

  齋藤開, 三浦植幸, 日高宏之, 柳澤達也, 網塚浩, 田端千紘, VALISKA Michal, UHLIROVA Klara, PLOKLESKA Jan, SECHOVSKY Vladimir

  日本物理学会講演概要集(CD-ROM)  2017/03
• UNi₄Bのトロイダル秩序状態における新奇電流磁気交差相関の研究 II  [Not invited]

  網塚浩, 齋藤開, 柳澤達也, 日高宏之, 鹿内奈南, 立松愛梨, 田端千紘, 本間佳哉, 李徳新, 清水悠晴, 仲村愛, 本多史憲, 青木大

  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2017
• RBe₁₃における異常な電気抵抗温度依存性と低励起アインシュタインフォノンの関係

  日高宏之, 水内康太, 山崎聖悟, 三浦植幸, 清水悠晴, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2017
• X線後方散乱によるURu₂Si₂の隠れた秩序相における結晶4回回転対称性の検証  [Not invited]

  網塚浩, 田端千紘, 齋藤開, 柳澤達也, 日高宏之, 稲見俊哉, 青木大, 本多史憲, 本間佳哉, 仲村愛

  日本物理学会講演概要集(CD-ROM)  2016/03
• Low-Temperature Physical Properties of RBe₁₃  [Not invited]

  Mizuuchi K, Nagata R, Miura N, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2016  一般社団法人 日本物理学会
   

  <p>重い電子系超伝導物質として知られるUBe_13_についてはこれまで盛んに研究が行われてきたが、一方でRBe_13_(R=希土類)に関する研究は、NaZn_13_型の結晶構造やf電子の性質に由来する物性を議論する上で重要と考えられるにもかかわらず充分に行われていない。最近我々は、希土類化合物RBe_13_(R=La、Nd、Sm等)のAl-フラックス法による単結晶試料育成を行い、その基礎物性測定について報告を行ってきた。本講演では、各物質の低温における物性について議論する予定である。</p>
• Pressure-induced quantum phase transition in Ferromagnet CeCd II  [Not invited]

  Shimmura Shogo, Mizuuchi Kota, Seguchi Taisei, Saito Hiraku, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi

  Meeting Abstracts of the Physical Society of Japan  2016  一般社団法人 日本物理学会
   

  <p>CeCdは常圧、16.5 Kで強磁性秩序を示すことが知られている。最近、我々はこの物質の高圧下・強磁場中電気抵抗測定を行い、3dや5f電子系強磁性体だけではなく、4f電子系においても1次の量子相転移が普遍的に起こる可能性が高いことを初めて明らかにした。本講演では、さらなる高圧下物性測定の結果を紹介し、他の強磁性体や理論モデルと比較してCeCdの圧力誘起量子相転移に関する議論をさらに行う予定である。</p>
• Development of a High-Temperature Electrical Resistivity Measurement System and the Application to 5f-electron Systems  [Not invited]

  Takai Mashiho, Tabata Chihiro, Saito Hiraku, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi

  Meeting Abstracts of the Physical Society of Japan  2016  一般社団法人 日本物理学会
   

  <p>一般にf電子系の低温領域における電子相関を理解するためには、c-f混成の影響が弱い高温領域（弱結合領域）でのf電子の局在的性質を把握することが重要である。5f電子系においては、多くの場合、この「高温領域」は室温以上に拡がっていると考えられる。そこで、従来の室温以下ミリケルビンまでの測定に加え、1200 Kまでの測定を行う装置開発を進めている。本公演では赤外線イメージ炉を用いた高温電気抵抗測定システムの開発過程を報告する。</p>
• Anomalous Ultrasonic Dispersion of SmOs₄Sb₁₂ under Hydrostatic Pressure  [Not invited]

  Mombetsu Shota, Inagaki Hiroyuki, Murazumi Taro, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi, Ho Pei-Chun, Maple M. Brian

  Meeting Abstracts of the Physical Society of Japan  2016  一般社団法人 日本物理学会
   

  <p>充填スクッテルダイト化合物SmOs_4_Sb_12_は従来の近藤効果では説明できない磁場に鈍感な重い電子状態を示す。また、カゴ状化合物に特徴的な局所原子振動「ラットリング」を示す。本研究では、静水圧力下における超音波測定を行い、ラットリングに起因して現れる超音波分散が圧力印加によってその特性温度を変え、低温秩序相内で観測される際、特性緩和時間が発散的に変化する振る舞いを捉えた。</p>
• The elastic response in magnetic field of toroidal magnetic order of UNi₄B  [Not invited]

  Matsumori H, Monbetsu S, Saito H, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2016  一般社団法人 日本物理学会
   

  <p>UNi4BはT_N_＝20Kで磁気秩序を示し、その秩序は近年提唱されたトロイダル秩序の候補として注目されている。本研究ではUNi_4_Bの磁気秩序に関する電子-格子相互作用について理解を深めるため、超音波音速測定を用い、横波弾性定数C66が秩序相直上および秩序相内でソフト化する振る舞いを観測した。また、磁場中弾性定数測定により詳細な磁場―温度相図を得た。</p>
• Low-Temperature Physical Properties in Th_1-xU_xBe₁₃ (0 < x < 1)  [Not invited]

  Miura Naoyuki, Uhlířová Klára, Prchal Jiří, Tabata Chihiro, Sechovský Vladimír, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi

  Meeting Abstracts of the Physical Society of Japan  2016  一般社団法人 日本物理学会
   

  <p>UBe_13_はエキゾチックな超伝導を示す重い電子系であり、また、転移温度以上では非フェルミ流体異常を示す。磁性希釈極限系Th_1-x_U_x_Be_13_$(x \leq 0.11)$ では通常フェルミ状態が実現することを我々は既に明らかにしているが、$x = 1$における非フェルミ状態へどのように移行するのかは自明ではない。本公演では全U濃度($0 \leq x \leq 1$)における低温物性（磁化率、電気抵抗、比熱）の実験結果を紹介し、UBe_13_における非フェルミ流体異常の起源について議論する。</p>
• 21pBL-12 Pressure-Induced Quantum Phase Transition in Ferromagnet CeCd  [Not invited]

  Hidaka H, Seguchi T, Shimmura S, Saito H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2016  一般社団法人 日本物理学会
  
• 20pBL-10 Tests for electromagnetic effect on a toroidal magnetic ordered state of UNi_4B III  [Not invited]

  Saito H, Uenishi K, Miura N, Tabata C, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2016  The Physical Society of Japan
  
• 19aBL-7 X-ray Crystal Structure Analysis of the Cage-Structural Compound RBe_<13> at Low Temperatures  [Not invited]

  Nagata R, Amitsuka H, Tabata C, Mizuuchi K, Shimizu Y, Miura N, Yamazaki S, Mombetsu S, Hidaka H, Yanagisawa T

  Meeting Abstracts of the Physical Society of Japan  2016  The Physical Society of Japan
  
• Th_1-xU_xBe₁₃(0

  三浦植幸, UHLIROVA Klara, PRCHAL Jiri, 田端千紘, SECHOVSKY Vladimir, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2016
• Th_1-xU_xBe₁₃(0

  日高宏之, 水内康太, 三浦植幸, 瀬口泰生, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2016
• UNi₄Bのトロイダル磁気秩序における磁場中超音波弾性応答

  松盛泰明, 酒井新, 門別翔太, 齋藤開, 柳澤達也, 日高宏之, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2016
• URu₂Si₂の強磁場弾性応答 III

  柳澤達也, 門別翔太, 日高宏之, 網塚浩, CONG P. T., YASHIN S., ZHERLITSYN S., WOSNITZA J., HUANG K., KANCHANAVATEE N., JANOSCHEK M., MAPLE M. B., 青木大, 青木大

  日本物理学会講演概要集(CD-ROM)  2016
• UAu₂Si₂の²⁹Si-NMR測定

  田端千紘, 井原慶彦, 新村省悟, 三浦植幸, 齋藤開, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2016
• カゴ状化合物RBe₁₃(R=希土類,アクチノイド)の低温X線結晶構造解析

  永田涼馬, 田端千紘, 水内康太, 清水悠晴, 三浦植幸, 山崎聖悟, 門別翔太, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2016
• Low-Temperature Magnetism of UAu₂Si₂ Studied by Magnetoresiscance Measurements  [Not invited]

  Tabata Chihiro, Miura Naoyuki, Uhlířová Klára, Vališka Michal, Sechovský Vladimír, Saito Hiraku, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi

  Meeting Abstracts of the Physical Society of Japan  2016 

  UAu_2_Si_2_は約19Kで強磁性的な秩序を起こすということを除いて、その低温物性は明らかになっていなかった。最近、我々は本物質の単結晶育成に初めて成功し、詳細な基礎物性測定やNMR測定から19Kの秩序が強磁性ではなく、自発磁化を伴うが本質的には反強磁性であることを明らかにしてきた。本講演では磁気抵抗測定の結果を紹介し、輸送現象の側面から本物質の秩序に伴う磁性の変化について議論する。

• 19aBL-4 ^<29>Si-NMR Study on UAu_2Si_2  [Not invited]

  Tabata C, Ihara Y, Shimmura S, Miura N, Saito H, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2016
• 19aBL-3 Elastic Response of URu_2Si_2 under High-Magnetic Field (Part 3)  [Not invited]

  Yanagisawa T, Kanchanavatee N, Janoschek M, Maple M. B, Aoki D, Mombetsu S, Hidaka H, Amitsuka H, Cong P. T, Yashin S, Zherlitsyn S, Wosnitza J, Huang K

  Meeting Abstracts of the Physical Society of Japan  2016
• 19aBL-2 X-ray back-scattering study of crystalline four-fold rotational symmetry in the hidden order phase of URu_2Si_2  [Not invited]

  Amitsuka H, Nakamura A, Tabata C, Saito H, Yanagisawa T, Hidaka H, Inami T, Aoki D, Honda F, Homma Y

  Meeting Abstracts of the Physical Society of Japan  2016
• Effects of Pressure on MnSi film  [Invited]

  Hiroyuki Hidaka

  未来を拓く高圧力科学セミナーシリーズ（40）「良質高圧力に支えられた物理学」  2015/02
• 16aDA-6 The Contribution of Toroidal Ordering on Hall Coefficient in UNi_4B  [Not invited]

  Saito H, Miura N, Tabata C, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 19aDA-11 High-Frequency Ultrasonic Measurements on SmOs_4Sb<12> under Hydrostatic Pressure II  [Not invited]

  Mombetsu Shota, Inagaki Hiroyuki, Murazumi Taro, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi, Ho Pei-Chun, Maple M. Brian

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 19aDA-6 X-ray Structural Analysis of the Cage Structural Compound RBe_<13> at Low Temperature  [Not invited]

  Nagata R, Amitsuka H, Tabata C, Miura N, Yamazaki S, Mombetsu S, Mizuuchi K, Shimizu Y, Hidaka H, Yanagisawa T

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 18pDA-10 Electric Responses of Cage-Structured Compound PrNi_2Cd_<20>  [Not invited]

  Yanagisawa T, Wosnitza J, Yazici D, White B. D, Maple M. B, Mombetsu S, Hidaka H, Amitsuka H, Cong P. T, Zherlitsyn S

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 17pCD-14 Pressure Effects on Ferromagnetic Compound CeCd  [Not invited]

  Seguchi T, Tabata C, Shimmura S, Nagata R, Saito H, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 17pCD-13 Effects of Pressure on Ferroquadrupole and Ferromagnetic Order in CeAg : High-Pressure Magnetization Measurement  [Not invited]

  Hidaka H, Shimmura S, Seguchi T, Saito H, Otani S, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 17aPS-131 Development of Magnetic-Torque-Measurement System with Multi-Axis Rotating Mechanism  [Not invited]

  Uenishi K, Tabata C, Tatematsu E, Seguchi T, Saito H, Miura N, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 16aDA-10 Ultrasonic Elastic Response for Heavy Fermion Superconductor U_<1-x>Th_xBe_<13>  [Not invited]

  Inagaki Hiroyuki, Zherlitsyn S, Wosnitza J, Monbetsu Shota, Shimizu Yusei, Yanagisawa Tatsuya, Hidaka Hiroyuki, Amitsuka Hiroshi, Yazici D, Maple M. B, Cong P. T

  Meeting Abstracts of the Physical Society of Japan  2015  一般社団法人 日本物理学会
  
• 16aDA-4 Low-Temperature Magnetism of UAu_2Si_2 III  [Not invited]

  Tabata C, Ihara Y, Amitsuka H, Miura N, Uhlirova Klara, Valiska Michal, Sechovsky Vladimir, Shimmura S, Saito H, Hidaka H, Yanagisawa T

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 24aBE-12 Tests for electromagnetic effect on a toroidal magnetic ordered state of UNi_4B II  [Not invited]

  Saito H, Uenishi K, Miura N, Tabata C, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2015  The Physical Society of Japan
  
• 強相関5f電子系における量子異常の解明と探索  [Not invited]

  網塚浩, 田端千紘, 三浦植幸, 立松愛梨, 柳澤達也, 日高宏之, 本間佳哉, 本多史憲, 李徳新, 仲村愛, 青木大

  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2015
• 強相関5f電子系化合物における量子異常の研究と新規物性の探索  [Not invited]

  網塚浩, 田端千紘, 三浦植幸, 柳澤達也, 日高宏之, 本間佳哉, 李徳新, 本多史憲, 青木大

  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2015
• カゴ状化合物RBe₁₃(R=希土類)の低温X線構造解析

  永田涼馬, 田端千紘, 三浦植幸, 山崎聖悟, 門別翔太, 水内康太, 清水悠晴, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2015
• 静水圧力下におけるSmOs₄Sb₁₂の高周波超音波弾性定数測定 II

  門別翔太, 稲垣宏幸, 村住太郎, 日高宏之, 柳澤達也, 網塚浩, HO Pei-Chun, BRIANMAPLE M.

  日本物理学会講演概要集(CD-ROM)  2015
• 籠状化合物PrNi₂Cd₂₀の弾性応答

  柳澤達也, YAZICI D., WHITE B. D., MAPLE M. B., 門別翔太, 日高宏之, 網塚浩, CONG P. T., ZHERLITSYN S., WOSNITZA J.

  日本物理学会講演概要集(CD-ROM)  2015
• UAu₂Si₂の低温磁性 III

  田端千紘, 三浦植幸, UHLIROVA Klara, VALISKA Michal, SECHOVSKY Vladimir, 新村省悟, 齋藤開, 日高宏之, 柳澤達也, 井原慶彦, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2015
• 重い電子系超伝導体U_1-xTh_xBe₁₃の超音波弾性応答

  稲垣宏幸, 門別翔太, 清水悠晴, 柳澤達也, 日高宏之, 網塚浩, YAZICI D., MAPLE M.B., CONG P.T., ZHERLITSYN S., WOSNITZA J.

  日本物理学会講演概要集(CD-ROM)  2015
• UAu₂Si₂の低温磁性 II

  田端千紘, 井原慶彦, 新村省悟, 齋藤開, 三浦植幸, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集(CD-ROM)  2015
• 静水圧力下におけるSmOs₄Sb₁₂の高周波超音波弾性定数測定

  門別翔太, 稲垣宏幸, 村住太郎, 日高宏之, 柳澤達也, 網塚浩, HO Pei-Chun, MAPLE M. Brian

  日本物理学会講演概要集(CD-ROM)  2015
• 24aBE-8 Low-Temperature Magnetism of UAu_2Si_2 II  [Not invited]

  Tabata C, Ihara Y, Shimmura S, Saito H, Miura N, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2015
• 22pBA-16 Physical Properties of the Cage-Structural Compound RBe_<13> III  [Not invited]

  Hidaka H, Mizuuchi K, Miura N, Nagata R, Tabata C, Yanagisawa T, Amitsuka H

  Meeting Abstracts of the Physical Society of Japan  2015
• 21pBB-13 High-Frequency Ultrasonic Measurements on SmOs_4Sb_<12> under Hydrostatic Pressure  [Not invited]

  Mombetsu Shota, Inagaki Hiroyuki, Murazumi Taro, Hidaka Hiroyuki, Yanagisawa Tatsuya, Amitsuka Hiroshi, Ho Pei-Chun, Maple M. Brian

  Meeting Abstracts of the Physical Society of Japan  2015
• Physical Properties of RBe13  [Invited]

  日高宏之, 山崎聖悟, 清水悠晴, 三浦植幸, 田端千紘, 柳澤達也, 網塚浩

  平成26年度物性研究所短期研究会「スクッテルダイト化合物及び関連物質を舞台とした 強相関電子系物理の新展開」  2014/10
• 一軸圧力下におけるURu₂Si₂の超音波測定  [Not invited]

  MURAZUMI TARO, INAGAKI HIROYUKI, MOMBETSU SHOTA, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2014/08
• UNi₄Bのトロイダル磁気秩序状態における電流磁気効果の検証  [Not invited]

  SAITO HIRAKI, UENISHI KENTA, MIURA NAOYUKI, TABATA CHIHIRO, MATSUMORI HIROAKI, MIZUUCHI KOTA, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2014/08
• UAu₂Si₂の低温磁性  [Not invited]

  TABATA CHIHIRO, MIURA NAOYUKI, SAITO HIRAKI, SEGUCHI TAISEI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2014/08
• CeAgの温度‐圧力相図  [Not invited]

  HIDAKA HIROYUKI, SAITO HIRAKI, OTANI SHIN'YA, SEGUCHI TAISEI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2014/08
• U₃Pd₂₀Si₆の磁場中弾性応答 II  [Not invited]

  HIURA KENTA, YANAGISAWA TATSUYA, MOMBETSU SHOTA, MURAZUMI TARO, INAGAKI HIROYUKI, HIDAKA HIROYUKI, AMITSUKA HIROSHI, TATEIWA NAOYUKI, HAGA YOSHINORI

  日本物理学会講演概要集  2014/08
• 10aBK-7 titletitle  [Not invited]

  Hiura K, Yanagisawa T, Mombetsu S, Murazumi T, Inagaki H, Hidaka H, Amitsuka H, Tateiwa N, Haga Y

  Meeting abstracts of the Physical Society of Japan  2014/08
• 9aBK-13 Tests for galvanomagnetic effect on a toroidal magnetic ordered state of UNi_4B  [Not invited]

  Saito H, Uenishi K, Miura N, Tabata C, Matsumori H, Mizuuchi K, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2014/08
• 9aBK-12 Low-Temperature Magnetic Properties of UAu_2Si_2  [Not invited]

  Tabata C, Miura N, Saito H, Seguchi T, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2014/08
• 9aBK-9 Ultrasonic Measurements of URu_2Si_2 under Uniaxial Pressure  [Not invited]

  Murazumi T, Inagaki H, Mombetsu S, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2014/08
• 9aBJ-12 Pressure-Temperature Phase Diagram in CeAg  [Not invited]

  Hidaka H, Saito H, Otani S, Seguchi T, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2014/08
• High-Pressure Study of Ferromagnetism in CeAg  [Not invited]

  H. Hidaka, S. Otani, H. Saito, K. Tatsumi, T. Yanagisawa, H. Amitsuk

  International Conference on Strongly Correlated Electron Systems 2013  2014/08
• Specific Heat, Magnetization and Electrical Transport Properties of Single Crystalline SmBe13  [Not invited]

  Hiroyuki Hidaka, Seigo Yamazaki, Naoyuki Miura, Yusei Shimizu, Chihiro Tabata, Tatsuya Yanagisawa, Hiroshi Amitsuka

  International Conference on Strongly Correlated Electron Systems 2014  2014/07
• Effects of Pressure on CeAg  [Not invited]

  Hiroyuki Hidaka, Hiraku Saito, Shinya Otani, Kaori Tatsumi, Tatsuya Yanagisawa, Hiroshi Amitsuka

  The 11th Prague Colloquium on f-Electron System  2014/07
• 強相関5f電子系化合物における量子異常の研究と新規物性の探索  [Not invited]

  AMITSUKA HIROSHI, TABATA CHIHIRO, MIURA NAOYUKI, YANAGISAWA TATSUYA, HIDAKA HIROYUKI, HONMA YOSHIYA, RI TOKUSHIN, HONDA FUMINORI, AOKI DAI

  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2014/06
• SmBe₁₃のミュオンスピン緩和測定  [Not invited]

  TABATA CHIHIRO, YAMAZAKI SEIGO, ITO TAKASHI, HIGEMOTO WATARU, MIURA NIMEYUKI, SHIMIZU YUSEI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2014/03
• URu₂Si₂の強磁場弾性応答 II  [Not invited]

  YANAGISAWA TATSUYA, MOMBETSU SHOTA, HIDAKA HIROYUKI, AMITSUKA HIROSHI, AKATSU MITSUHIRO, YASIN SHADI, ZHERLITSYN SERGEI, WOSNITZA JOCHEN, HUANG KEVIN, JANOSCHEK M, MAPLE M. BRIAN

  日本物理学会講演概要集  2014/03
• カゴ状化合物RBe₁₃(R=希土類)の基礎物性 II  [Not invited]

  HIDAKA HIROYUKI, YAMAZAKI SEIGO, SHIMIZU YUSEI, MIURA NIMEYUKI, TABATA CHIHIRO, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2014/03
• 29pBE-7 Elastic Responses of URu_2Si_2 under High-Magnetic Fields (part two)  [Not invited]

  Yanagisawa T, Mombetsu S, Hidaka H, Amitsuka H, Akatsu M, Yasin Shaai, Zherlitsyn Sergei, Wasnitza Jochen, Huang Kevin, Janoschek M, Maple Brian

  Meeting abstracts of the Physical Society of Japan  2014/03
• 27pBE-2 Muon Spin Relaxation Study of SmBe_<13>  [Not invited]

  Tabata C, Yamazaki S, Ito T. U, Higemoto W, Miura N, Shimizu Y, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2014/03
• 27pBE-1 Physical Properties of the Cage Structural Compound RBe_<13> II  [Not invited]

  Hidaka H, Yamazaki S, Shimizu Y, Miura N, Tabata C, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2014/03
• CeAgの温度-圧力相図

  日高宏之, 齋藤開, 大谷真也, 瀬口泰生, 柳澤達也, 網塚浩

  日本物理学会講演概要集  2014
• μSRでみたSmBe₁₃の低温磁気異常  [Not invited]

  TABATA CHIHIRO, YAMASAKI SHOGO, ITO TAKASHI, HIGEMOTO WATARU, MIURA NAOYUKI, SHIMIZU YUSEI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  物構研サイエンスフェスタ要旨集  2014
• URu₂Si₂の隠れた秩序における構造変化の検証  [Not invited]

  AMIZUKA HIROSHI, TABATA CHIHIRO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, KUMAI REIJI, KOBAYASHI KENSUKE, NAKAO HIRONORI, MURAKAMI YOICHI, INAMI TOSHIYA, MICHIMURA SHINJI, YOKOYAMA MAKOTO

  物構研サイエンスフェスタ要旨集  2014
• 希土類カゴ状化合物SmBe₁₃の弾性応答  [Not invited]

  MOMBETSU SHOTA, MURASUMI TARO, HIURA KENTA, YAMAZAKI SEIGO, SHIMIZU YUSEI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2013/08
• 強磁性体CeAgの圧力効果 IV  [Not invited]

  OTANI SHIN'YA, HIDAKA HIROYUKI, SAITO HIRAKI, TATSUMI KAORI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2013/08
• 同心軸を用いた低温用2軸独立回転試料プローブの開発  [Not invited]

  ABIKO KAZUHIRO, SAITO HIRAKI, MIURA NAOYUKI, UENISHI KENTA, SEGUCHI TAISHO, TABATA CHIHIRO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2013/08
• カゴ状化合物RBe₁₃(R=希土類)の基礎物性  [Not invited]

  HIDAKA HIROYUKI, YAMAZAKI SEIGO, SAITO HIRAKI, SHIMIZU YUSEI, MOMBETSU SHOTA, MURASUMI TARO, MIURA NAOYUKI, TABATA CHIHIRO, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2013/08
• (Th,U)Be₁₃の磁性  [Not invited]

  MIURA NAOYUKI, SHIMIZU YUSEI, YAMAZAKI SEIGO, SAITO HIRAKI, TABATA CHIHIRO, MOMBETSU SHOTA, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2013/08
• URu₂Si₂の高分解能X線回折  [Not invited]

  TABATA CHIHIRO, INAMI TOSHIYA, MICHIMURA SHINJI, YOKOYAMA MAKOTO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2013/08
• Magnetism of(Th,U)Be_<13>  [Not invited]

  Miura N, Shimizu Y, Yamazaki S, Saito H, Tabata C, Mombetsu S, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2013/08
• High-resolution X-ray diffraction study of URu_2Si_2  [Not invited]

  Tabata C, Inami T, Michimura S, Yokoyama M, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2013/08
• Development of Sample Rotator with Two-Independent-Rotational-Axes driven by Concentric Line for Low Temperature  [Not invited]

  Abiko K, Saito H, Miura N, Uenishi K, Seguchi T, Tabata C, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2013/08
• Effects of Pressure on Ferromagnet CeAg IV  [Not invited]

  Otani S, Hidaka H, Saito H, Tatsumi K, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2013/08
• Elastic Property of the Rare Earth-based Cage Structural Compound SmBe_<13>  [Not invited]

  Mombetsu S, Murazumi T, Hiura K, Yamazaki S, Shimizu Y, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2013/08
• Physical Properties of the Cage Structural Compound RBe_<13>(R=Rare Earths)  [Not invited]

  Hidaka H, Yamazaki S, Saito H, Shimizu Y, Mombetsu S, Murazumi T, Miura N, Tabata C, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2013/08
• 強相関5f電子系における量子異常の研究と新規物性の探索  [Not invited]

  AMITSUKA HIROSHI, YANAGISAWA TATSUYA, HIDAKA HIROYUKI, HONMA YOSHIYA, RI TOKUSHIN, TABATA CHIHIRO, MOMBETSU SHOTA, HIURA KENTA

  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2013/06
• 29aEN-9 Effects of Pressure on Ferromagnet CeAg III  [Not invited]

  Hidaka H, Saito H, Otani S, Tatsumi K, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2013/03
• 26pXT-16 Low-temperature Physical Property on the Cage Structural Compound SmBe_<13>  [Not invited]

  Yamazaki S, Shimizu Y, Saito H, Tabata C, Mombetsu S, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2013/03
• 26pXT-12 Simultaneous Measurement of Elastic Constant and Resistivity Near the T_c of Non-BCS-type Superconductor PrOs_4Sb_<12> II  [Not invited]

  Mombetsu S, Hiura K, Hidaka H, Yanagisawa T, Amitsuka H, Maple M. B

  Meeting abstracts of the Physical Society of Japan  2013/03
• 26aXA-7 Elastic Response of U_3Pd_<20>Si_6 in Magnetic Field  [Not invited]

  Hiura K, Mombetsu S, Hidaka H, Yanagisawa T, Amitsuka H, Tateiwa N, Haga Y

  Meeting abstracts of the Physical Society of Japan  2013/03
• 26aXA-6 Uniaxial-stress effect on commensurate-incommensurate antiferromagnetic orders in UPd_2Si_2  [Not invited]

  Yokoyama M, Nakada T, Tabata C, Hidaka H, Amitsuka H, Tenya K, Sato T. J

  Meeting abstracts of the Physical Society of Japan  2013/03
• 26aXA-4 Elastic Responses of URu_2Si_2 under High-Magnetic Fields  [Not invited]

  Yanagisawa T, Mombetsu S, Hidaka H, Amitsuka H, Akatsu M, Yasin Shadi, Zherlitsyn Sergei, Wosnitza Jochen, Huang Kevin, Maple M. Brian

  Meeting abstracts of the Physical Society of Japan  2013/03
• 26aXA-2 X-ray diffraction study of URu_2Si_2 III  [Not invited]

  Tabata C, Hidaka H, Yanagisawa T, Yokoyama M, Amitsuka H, Kobayashi K, Kumai R, Nakao H, Murakami Y

  Meeting abstracts of the Physical Society of Japan  2013/03
• PrOs₄Sb₁₂の非BCS型超伝導転移近傍における弾性定数と電気抵抗の同時測定 II  [Not invited]

  MOMBETSU SHOTA, HIURA KENTA, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI, MAPLE M. B

  日本物理学会講演概要集  2013/03
• 強磁性体CeAgの圧力効果 III  [Not invited]

  HIDAKA HIROYUKI, SAITO HIRAKI, OTANI SHIN'YA, TATSUMI KAORI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2013/03
• URu₂Si₂のX線構造解析 III  [Not invited]

  TABATA CHIHIRO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, AMITSUKA HIROSHI, KOBAYASHI KENSUKE, KUMAI REIJI, NAKAO HIRONORI, MURAKAMI YOICHI

  日本物理学会講演概要集  2013/03
• U₃Pd₂₀Si₆の磁場中弾性応答  [Not invited]

  HIURA KENTA, MOMBETSU SHOTA, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI, TATEIWA NAOYUKI, HAGA YOSHINORI

  日本物理学会講演概要集  2013/03
• URu₂Si₂の強磁場弾性応答  [Not invited]

  YANAGISAWA TATSUYA, MOMBETSU SHOTA, HIDAKA HIROYUKI, AMITSUKA HIROSHI, AKATSU MITSUHIRO, YASIN SHADI, ZHERLITSYN SERGEI, WOSNITZA JOCHEN, HUANG KEVIN, MAPLE M. BRIAN

  日本物理学会講演概要集  2013/03
• カゴ状構造を持つSmBe₁₃の低温物性  [Not invited]

  YAMAZAKI SEIGO, SHIMIZU YUSEI, SAITO HIRAKI, TABATA CHIHIRO, MOMBETSU SHOTA, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2013/03
• UPd₂Si₂の整合‐不整合反強磁性に対する一軸応力効果  [Not invited]

  YOKOYAMA MAKOTO, NAKADA TAKAHIRO, TABATA CHIHIRO, HIDAKA HIROYUKI, AMITSUKA HIROSHI, TEN'YA KEN'ICHI, SATO TAKASHI

  日本物理学会講演概要集  2013/03
• High-Pressure Study on URu2Si2 and U4Ru7Ge6  [Not invited]

  Hiroyuki Hidaka

  新学術領域研究「重い電子系の形成と秩序化」第4回研究会  2013/01
• Gamma(3)-Type Lattice Instability and the Hidden Order of URu2Si2  [Not invited]

  Tatsuya Yanagisawa, Shota Mombetsu, Hiroyuki Hidaka, Hiroshi Amitsuka, Mitsuhiro Akatsu, Shadi Yasin, Sergei Zherlitsyn, Jochen Wosnitza, Kevin Huang, M. Brian Maple

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN  2013/01  PHYSICAL SOC JAPAN
   

  We have performed ultrasonic measurements on single-crystalline URu2Si2 with pulsed magnetic fields, in order to check for possible lattice instabilities due to the hybridized state and the hidden-order state of this compound. The elastic constant (C-11 - C-12)/2, which is associated with a response to the Gamma(3)-type symmetry-breaking (orthorhombic) strain field, shows a three-step increase at H >= 35 T for H parallel to c at low temperatures, where successive meta-magnetic transitions are observed in the magnetization. We discovered a new fact that the absolute change of the softening of (C-11 - C-12)/2 in the temperature dependence is quantitatively recovered at the suppression of hybridized-electronic state and the hidden order in high-magnetic field for H parallel to c associated with the successive transitions. The present results suggest that the Gamma(3)-type lattice instability, is related to both the emergence of the hybridized electronic state and the hidden-order parameter of URu2Si2. On the other hand, magnetic fields H parallel to [100] and [110] enhance the softening of (C-11 - C-12)/2 in the hidden order phase, while no step-like anomaly is observed up to 68.7 T. We discuss the limitation of the localized-electron picture for describing these features of URu2Si2 by examination of a crystalline electric field model in terms of mean-field theory.
• UPd₂Si₂の整合-不整合反強磁性に対する一軸応力効果

  横山淳, 中田崇寛, 田端千紘, 日高宏之, 網塚浩, 天谷健一, 佐藤卓

  日本物理学会講演概要集  2013
• URu₂Si₂における放射光X線構造解析  [Not invited]

  TABATA CHIHIRO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, AMITSUKA HIROSHI, KOBAYASHI KENSUKE, KUMAI REIJI, NAKAO HIRONORI, MURAKAMI YOICHI

  物構研サイエンスフェスタ要旨集  2013
• Ultrasonic Measurements of URu2Si2 under Pulsed-Magnetic Fields  [Not invited]

  YANAGISAWA T, MOMBETSU S, HIDAKA H, AMITSUKA H, AKATSU M, YASIN S, ZHERLITSYN S, WOSNITZA J, HUANG K, MAPLE M. B

  日本物理学会講演概要集  2012/08
• URu₂Si₂のX線構造解析 II  [Not invited]

  TABATA CHIHIRO, MIURA NAOYUKI, ABIKO KAZUHIRO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, AMITSUKA HIROSHI, KOBAYASHI KENSUKE, KUMAI REIJI, NAKAO HIRONORI, MURAKAMI YOICHI

  日本物理学会講演概要集  2012/08
• 強磁性体CeAgの圧力効果 II  [Not invited]

  OTANI SHIN'YA, HIDAKA HIROYUKI, TATSUMI KAORI, SHIMIZU YUSEI, IGARASHI HIDEKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2012/08
• PrOs₄Sb₁₂の非BCS型超伝導転移近傍における弾性定数と電気抵抗の同時測定  [Not invited]

  MOMBETSU SHOTA, HIURA KENTA, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI, MAPLE M. B

  日本物理学会講演概要集  2012/08
• 20pFH-5 Effects of Pressure on Ferromagnet CeAg II  [Not invited]

  Otani S, Hidaka H, Tatsumi K, Shimizu Y, Igarashi H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2012/08
• 19pHC-15 Simultaneous Measurement of Elastic Constant and Resistivity Near the T_c of Non-BCS-type Superconductor PrOs_4Sb_<12>  [Not invited]

  Mombetsu S, Hiura K, Hidaka H, Yanagisawa T, Amitsuka H, Maple M. B

  Meeting abstracts of the Physical Society of Japan  2012/08
• 18pGA-5 X-ray diffraction study of URu_2Si_2 II  [Not invited]

  Tabata C, Miura N, Abiko K, Hidaka H, Yanagisawa T, Yokoyama M, Amitsuka H, Kobayashi K, Kumai R, Nakao H, Murakami Y

  Meeting abstracts of the Physical Society of Japan  2012/08
• Magnetization Measurements under High Pressure on Incommensurate-Commensurate Phase Transitions on UPd₂Si₂  [Not invited]

  H. Hidaka, H. Igarashi, Y. Shimizu, C. Tabata, T. Yanagisawa, H. Amitsuka

  International Conference on Magnetism 2012  2012/07  Busan, Korea  International Conference on Magnetism
  
• Duality of 5f Electrons in UPd₂Si₂  [Not invited]

  H. Hidaka, H. Igarashi, Y. Shimizu, C. Tabata, T. Yanagisawa, H. Amitsuka

  The Fourth International Workshop on the Dual Nature of f-Electrons  2012/07  Himeji, Japan
• 強磁性体CeAgの圧力効果  [Not invited]

  大谷真也, 日高宏之, 清水悠晴, 五十嵐英紀, 柳澤達也, 網塚浩

  日本物理学会講演概要集  2012/03
• SmOs₄Sb₁₂の強磁場下に於ける弾性応答  [Not invited]

  柳澤達也, 門別翔太, 日高宏之, 網塚浩, 赤津光洋, 根本祐一, 後藤輝孝, YASHIN S, ZHERLITSYN S, WOSNITZA J

  日本物理学会講演概要集  2012/03
• パルス磁場を用いたSmOs₄Sb₁₂の超音波測定  [Not invited]

  門別翔太, 柳澤達也, 日高宏之, 網塚浩, 赤津光洋, 根本祐一, 後藤輝孝, YASHIN S, ZHERLITSYN S, WOSNITZA J

  日本物理学会講演概要集  2012/03
• Ce₃Pd₂₀Ge₆の圧力効果  [Not invited]

  日高宏之, 大谷真也, 若林琢巳, 清水悠晴, 網塚浩, 柳澤達也, RAMOS S. M, HERING E. N, FONTES M. B, BAGGIO‐SAITOVITCH E

  日本物理学会講演概要集  2012/03
• 25pPSB-19 Ultrasonic Measurement of SmOs_4Sb_<12> with Pulse Magnetic Field  [Not invited]

  Mombetsu S, Yanagisawa T, Hidaka H, Amitsuka H, Akatsu M, Nemoto Y, Goto T, Yashin S, Zherlitsyn S, Wosnitza J

  Meeting abstracts of the Physical Society of Japan  2012/03
• 25pYB-4 Magnetization Measurements under High Pressure on Incommensurate-Commensurate Magnetic Phase Transitions of UPd_2Si_2 II  [Not invited]

  Igarashi H, Hidaka H, Shimizu Y, Tabata C, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2012/03
• 25pYB-2 X-ray diffraction study of URu_2Si_2  [Not invited]

  Tabata C, Miura N, Abiko K, Hidaka H, Yanagisawa T, Yokoyama M, Amitsuka H, Kobayashi K, Kumai R, Nakao H, Murakami Y

  Meeting abstracts of the Physical Society of Japan  2012/03
• 24pPSB-36 Pressure Effects of Ferromagnet CeAg  [Not invited]

  Otani S, Hidaka H, Shimizu Y, Igarashi H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2012/03
• 24pYB-12 Effects of Pressure on Ce_3Pd_<20>Ge_6  [Not invited]

  Hidaka H, Otani S, Wakabayashi T, Shimizu Y, Amitsuka H, Yanagisawa T, Ramos S.M, Hering E.N, Fontes M.B, Saitovitch E

  Meeting abstracts of the Physical Society of Japan  2012/03
• 24pYB-6 Elastic Response of SmOs_4Sb_<12> under High Magnetic Field  [Not invited]

  Yanagisawa T, Mombetsu S, Hidaka H, Amitsuka H, Akatsu M, Nemoto Y, Goto T, Yashin S, Zherlitsyn S, Wosnitza J

  Meeting abstracts of the Physical Society of Japan  2012/03
• URu₂Si₂のX線構造解析

  田端千紘, 三浦植幸, 安孫子和弘, 日高宏之, 柳澤達也, 横山淳, 網塚浩, 小林賢介, 熊井玲児, 中尾裕則, 村上洋一

  日本物理学会講演概要集  2012
• 単結晶構造解析によるURu₂Si₂の隠れた秩序状態の解明  [Not invited]

  田端千紘, 三浦植幸, 安孫子和弘, 日高宏之, 柳澤達也, 横山淳, 網塚浩, 小林賢介, 熊井玲児, 中尾裕則, 村上洋一

  PFシンポジウム要旨集  2012
• Anomalous Upper Critical Field in the Heavy-Fermion Superconductor UBe13 Studied by DC Magnetization Measurements  [Not invited]

  Shimizu Yusei, Haga Yoshinori, Tenya Kenichi, Yanagisawa Tatsuya, Hidaka Hiroyuki, Amitsuka Hiroshi

  INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011)  2012
• Effects of Pressure on Cage-structural compound Ce₃Pd₂₀Ge₆  [Not invited]

  H. Hidaka, T. Wakabayashi, S. Otani, T. Yanagisawa, H. Amitsuka, S.M. Ramos, E.N. Hering, M.B. Fontes, E. Baggio-Saitovitch

  X Encontro da SBPMat 2011  2011/09  Gramado, Brazil  SBPMat
  
• Effects of Pressure on Incommensurate-Commensurate Magnetic Phase Transitions in UPd₂Si₂  [Not invited]

  H. Hidaka, A. Tanaka, H. Igarashi, Y. Kurahashi, Y. Shimizu, T. Yanagisawa, H. Amitsuka

  Brazil - Japan Mini Workshop on Heavy Electron Physics  2011/09  Rio de Janeiro, Brazil  H. Hidaka
  
• Effects of Pressure on Cage-structural compound Ce₃Pd₂₀Ge₆  [Not invited]

  H. Hidaka, T. Wakabayashi, S. Otani, T. Yanagisawa, H. Amitsuka, S.M. Ramos, E.N. Hering, M.B. Fontes, E. Baggio-Saitovitch

  Workshop: “From Blue Pigment to Green energy: Cobolt mines - Skutterudites - Thermoelectrics”  2011/09  Vikersund, Norway
• Effects of Pressure on Cage-structural compound Ce₃Pd₂₀Ge₆  [Not invited]

  H. Hidaka, T. Wakabayashi, S. Otani, T. Yanagisawa, H. Amitsuka, S.M. Ramos, E.N. Hering, M.B. Fontes, E. Baggio-Saitovitch

  Strongly Correlated Electon Systems 2011  2011/08  Cambridge, UK,  SCES
  
• 重い電子系超伝導体UBe₁₃における異常な磁気特性  [Not invited]

  清水悠晴, 池田陽一, 芳賀芳範, 日高宏之, 柳澤達也, 網塚浩

  日本物理学会講演概要集  2011/08
• 23aPS-84 Acoustic de Haas-van Alphen Effect of SmOs_4Sb_<12>  [Not invited]

  Yanagisawa T, Monbetsu S, Hidaka H, Amitsuka H, Akatsu M, Araki K, Nemoto Y, Goto T, Ho Pei-Chun, Baumbach Ryan E, Maple M. Brian

  Meeting abstracts of the Physical Society of Japan  2011/08
• 23pGC-7 Magnetization Measurements of UPd_2Si_2 on Incommensurate and Commensurate Magnetic Phases under High Pressure  [Not invited]

  Igarashi H, Hidaka H, Shimizu Y, Tabata C, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2011/08
• 24aGC-7 Anomalous Magnetic Properties in the Superconducting Mixed State of the Heavy-Fermion Superconductor UBe_<13>  [Not invited]

  Shimizu Y, Ikeda Y, Haga Y, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2011/08
• 24aGC-9 Elastic Response of Rh-substitution System of URu_2Si_2  [Not invited]

  Watanabe Y, Saito H, Hiura K, Shimizu Y, Yanagisawa T, Hidaka H, Yokoyama M, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2011/08
• URu₂Si₂のRh置換系における弾性応答  [Not invited]

  WATANABE YUJIN, SAITO HITOSHI, HIURA KENTA, SHIMIZU YUSEI, YANAGISAWA TATSUYA, HIDAKA HIROYUKI, YOKOYAMA MAKOTO, AMITSUKA HIROSHI

  日本物理学会講演概要集  2011/08
• SmOs₄Sb₁₂の音響ドハース・ファンアルフェン効果  [Not invited]

  YANAGISAWA TATSUYA, MOMBETSU SHOTA, HIDAKA HIROYUKI, AMITSUKA HIROSHI, AKATSU MITSUHIRO, ARAKI KOJI, NEMOTO YUICHI, GOTO TERUTAKA, HO PEI-CHUN, BAUMBACH RYAN E, MAPLE M. BRIAN

  日本物理学会講演概要集  2011/08
• Effects of Pressure on Cage-structural compound Ce₃Pd₂₀Ge₆  [Not invited]

  H. Hidaka, T. Wakabayashi, S. Otani, T. Yanagisawa, H. Amitsuka, S.M. Ramos, E.N. Hering, M.B. Fontes, E. Baggio-Saitovitch

  Encontro de Fisica 2011  2011/06  Foz do Iguacu, Brazil  SBF
  
• 強相関5f電子系化合物における量子異常の研究と新規物性の探索  [Not invited]

  AMITSUKA HIROSHI, HONMA YOSHIYA, RI TOKUSHIN, YANAGISAWA TATSUYA, HIDAKA HIROYUKI, SHIMIZU YUSEI, KURAHASHI YOSUKE, TAKAHASHI SOSUKE, SAITO JUN, TABATA CHIHIRO

  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2011/06
• 25aEC-5 Maki Parameter of the heavy-Fermion Superconductor UBe_<13> II  [Not invited]

  Shimizu Y, Ikeda Y, Tenya K, Haga Y, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2011/03
• 25aEC-13 Neutron scattering study for UPd_2Si_2 under uniaxial-stress  [Not invited]

  Nakada T, Yokoyama M, Igarashi H, Tabata C, Hidaka H, Amitsuka H, Tenya K, Sato T. J

  Meeting abstracts of the Physical Society of Japan  2011/03
• 重い電子系超伝導体UBe₁₃におけるMakiパラメーター II  [Not invited]

  SHIMIZU YUSEI, IKEDA YOICHI, TEN'YA KEN'ICHI, HAGA YOSHINORI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2011/03
• UPd₂Si₂の一軸応力下中性子散乱  [Not invited]

  NAKADA TAKAHIRO, YOKOYAMA MAKOTO, IGARASHI HIDEKI, TABATA CHIHIRO, HIDAKA HIROYUKI, AMITSUKA HIROSHI, TEN'YA KEN'ICHI, SATO TAKASHI

  日本物理学会講演概要集  2011/03
• Effects of Pressure on Uranium-Based Ferromagnet U₄Ru₇Ge₆  [Not invited]

  H. Hidaka, S. Takahashi, Y. Shimizu, T. YanagisawaA, H. Amitsuka

  International Conference on Heavy Electrons 2010  2010/09  Tokyo, Japan  Heavy Electrons
  
• 25aWJ-7 Ultrasonic Dispersions of Filted-Skutterudite SmOs_4Sb_<12>  [Not invited]

  Yanagisawa T, Saito H, Hidaka H, Amitsuka H, Akatsu M, Araki K, Takahashi N, Nemoto Y, Goto T, Ho Pei-Chun, Baumbach Ryan E, Maple M. Brian

  Meeting abstracts of the Physical Society of Japan  2010/08
• 25pWJ-4 Angle resolved magnetization measurements of URu_2Si_2  [Not invited]

  Kurahashi Y, Nishikawa D, Shimizu Y, Hidaka H, Yanagisawa T, Yokoyama M, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/08
• 25pWJ-7 Elastic response of heavy fermion compound U(Ru_<1-x>Rh_x)_2Si_2  [Not invited]

  Saito H, Yanagisawa T, Mayama T, Ikeda Y, Hidaka H, Yokoyama M, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/08
• 25pWJ-15 Ginzburg-Landau Parameter of the Heavy-Fermion Superconductor UBe_<13>  [Not invited]

  Shimizu T, Ikeda Y, Tenya K, Haga Y, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/08
• 26aWJ-1 Effects of Pressure on Incommensurate-Commensurate Magnetic Phase Transitions in UPd_2Si_2  [Not invited]

  Hidaka H, Igarashi H, Tanaka A, Takahashi S, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/08
• 26aWJ-6 Physical Properties of Uranium-Based Ferromagnet U_4Ru_7Ge_6  [Not invited]

  Takahashi S, Hidaka H, Shimizu Y, Kurahashi Y, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/08
• U系強磁性化合物U₄Ru₇Ge₆の基礎物性  [Not invited]

  TAKAHASHI SOSUKE, HIDAKA HIROYUKI, SHIMIZU YUSEI, KURAHASHI YOSUKE, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/08
• UPd₂Si₂における非整合―整合磁気秩序の圧力効果  [Not invited]

  HIDAKA HIROYUKI, IGARASHI HIDEKI, TANAKA JUN, TAKAHASHI SOSUKE, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/08
• 充填スクッテルダイトSmOs₄Sb₁₂の超音波分散  [Not invited]

  YANAGISAWA TATSUYA, SAITO HITOSHI, HIDAKA HIROYUKI, AMITSUKA HIROSHI, AKATSU MITSUHIRO, ARAKI KOJI, TAKAHASHI NAOKI, NEMOTO YUICHI, GOTO TERUTAKA, HO PEI-CHUN, BAUMBACH RYAN E, MAPLE M. BRIAN

  日本物理学会講演概要集  2010/08
• 重い電子系化合物U(Ru_1-xRh_x)₂Si₂の弾性応答  [Not invited]

  SAITO HITOSHI, YANAGISAWA TATSUYA, MAYAMA TAICHI, IKEDA YOICHI, HIDAKA HIROYUKI, YOKOYAMA MAKOTO, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/08
• URu₂Si₂における角度分解磁化測定  [Not invited]

  KURAHASHI YOSUKE, NISHIKAWA DAICHI, SHIMIZU YUSEI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/08
• 重い電子系超伝導体UBe₁₃におけるGinzburg‐Landauパラメーター  [Not invited]

  SHIMIZU YUSEI, IKEDA YOICHI, TEN'YA KEN'ICHI, HAGA YOSHINORI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/08
• 強相関5f電子系化合物における量子異常の研究と新規物性の探索  [Not invited]

  AMITSUKA HIROSHI, YANAGISAWA TATSUYA, HIDAKA HIROYUKI, IKEDA YOICHI, SHIMIZU YUSEI, NISHIKAWA DAICHI, TANAKA JUN, MAYAMA TAICHI, YOKOYAMA MAKOTO, HAGA YOSHINORI, HONMA YOSHIYA

  東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター共同利用研究経過報告書(CD-ROM)  2010/07
• Effects of Pressure on Incommensurate-Commensurate Magnetic Phase Transitions in UPd₂Si₂  [Not invited]

  H. Hidaka, A. Tanaka, H. Igarashi, T. Yanagisawa, H. Amitsuka

  Strongly Correlated Electon Systems 2010  2010/06  Santa Fe, USA  SCES
  
• 21aPS-16 Ultrasonic measurement of heavy fermion compound U(Ru_<1-x>Rh_x)Si_2  [Not invited]

  Saito H, Yanagisawa T, Mayama T, Ikeda Y, Hidaka H, Yokoyama M, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/03
• 21aPS-23 Pressure-induced bicritical point in UPd_2Si_2  [Not invited]

  Hidaka H, Igarashi H, Tanaka A, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/03
• 21aPS-31 Ultrasonic Measurement of LaRu_4Sb_<12>  [Not invited]

  Yanagisawa T, Hidaka H, Amitsuka H, Cichorek T, Henkie Z, Maple M. B

  Meeting abstracts of the Physical Society of Japan  2010/03
• 21pGF-1 Magnetization Measurements of URu_2Si_2 under High Pressure II  [Not invited]

  Nishikawa D, Ikeda Y, Shimizu Y, Hidaka H, Yanagisawa T, Yokoyama M, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/03
• 21pGF-6 Thermodynamic Properties of the Heavy-Fermion Superconductor UBe_<13>  [Not invited]

  Shimizu Y, Ikeda Y, Wakabayashi T, Tenya K, Haga Y, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2010/03
• URu₂Si₂の高圧下磁化測定 II  [Not invited]

  NISHIKAWA DAICHI, IKEDA YOICHI, SHIMIZU YUSEI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/03
• 重い電子系超伝導体UBe₁₃における基礎物性測定  [Not invited]

  SHIMIZU YUSEI, IKEDA YOICHI, WAKABAYASHI TAKUMI, TEN'YA KEN'ICHI, HAGA YOSHINORI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/03
• 重い電子系化合物URu₂Si₂のRhドープ系における超音波測定  [Not invited]

  SAITO JUN, YANAGISAWA TATSUYA, MAYAMA TAICHI, IKEDA YOICHI, HIDAKA HIROYUKI, YOKOYAMA MAKOTO, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/03
• UPd₂Si₂における圧力誘起多重臨界点  [Not invited]

  HIDAKA HIROYUKI, IGARASHI HIDENORI, TANAKA ATSUSHI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2010/03
• 充填スクッテルダイトLaRu₄As₁₂の超音波測定  [Not invited]

  YANAGISAWA TATSUYA, HIDAKA HIROYUKI, AMITSUKA HIROSHI, CICHOREK T, HENKIE Z, MAPLE M

  日本物理学会講演概要集  2010/03
• Pressure-induced metal-insulator transition in the filled skutterudite PrFe₄P₁₂  [Not invited]

  H. Hidaka, H. Kotegawa, T. C. Kobayashi, H. Harima, H. Sugawara, H. Sato

  International symposium for young scientists on physics of strongly correlated electrons  2009/08  Sapporo, Japan  T. Yanagisawa
  
• 25aPS-49 Single site effects in La-diluted clathrate system of R_3Pd_<20>Ge_6(R=Ce, Pr)  [Not invited]

  Wakabayashi T, Hidaka H, Yanagisawa T, Yokoyama M, Tenya K, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/08
• 25pRG-10 Pressure Effect on EuIn_2P_2  [Not invited]

  Hidaka H, Tanaka A, Ikeda Y, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/08
• 25pTJ-6 Specific Heat Measurement of URu_2Si_2 under High Pressure II  [Not invited]

  Ikeda Y, Nishikawa D, Tanaka A, Kurahashi Y, Shimizu Y, Hidaka H, Yanagisawa T, Yokoyama M, Tenya K, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/08
• 25pTJ-7 Development of Measurement Method with NiCrAl Piston Cylinder Cell and Magnetization Measurements of URu_2Si_2 under High Pressure  [Not invited]

  Nishikawa D, Ikeda Y, Hidaka H, Yanagisawa T, Yokoyama M, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/08
• 25pTJ-8 Pressure effects of UPd_2Si_2  [Not invited]

  Tanaka A, Takahashi S, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/08
• 26aRL-11 Ultrasonic Measurement of Ratting in Pr_<1-x>Nd_xOs_4Sb_<12>  [Not invited]

  Yanagisawa T, Saito H, Mayama T, Ikeda Y, Hidaka H, Amitsuka H, Nemoto Y, Goto T, Takeda N, Ho P. -C, Maple M. B

  Meeting abstracts of the Physical Society of Japan  2009/08
• 27pTJ-1 Thermal Equilibrium Magnetization Measurement in the Superconducting Mixed State of the Heavy-Fermion Superconductor UBe_<13>  [Not invited]

  Shimizu Y, Ikeda Y, Tenya K, Haga Y, Hidaka H, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/08
• 27pTJ-5 Ultrasonic Measurement of Clathrate Compound U_3Pd_<20>Si_6  [Not invited]

  Mayama T, Yanagisawa T, Satio H, Hidaka H, Amitsuka H, Tateiwa N, Haga Y

  Meeting abstracts of the Physical Society of Japan  2009/08
• URu₂Si₂の圧力下比熱測定 II  [Not invited]

  IKEDA YOICHI, NISHIKAWA DAICHI, TANAKA ATSUSHI, KURAHASHI YOSUKE, SHIMIZU YUSEI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, TEN'YA KEN'ICHI, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/08
• Pr_1-xNd_xOs₄Sb₁₂におけるラットリングの超音波測定  [Not invited]

  YANAGISAWA TATSUYA, SAITO HITOSHI, MAYAMA TAICHI, IKEDA YOICHI, HIDAKA HIROYUKI, AMITSUKA HIROSHI, NEMOTO YUICHI, GOTO TERUTAKA, TAKEDA NAOYA, HO P.-C, MAPLE M. B

  日本物理学会講演概要集  2009/08
• カゴ状化合物U₃Pd₂₀Si₆の超音波測定  [Not invited]

  MAYAMA TAICHI, YANAGISAWA TATSUYA, SAITO HITOSHI, HIDAKA HIROYUKI, AMITSUKA HIROSHI, TATEIWA NAOYUKI, HAGA YOSHINORI

  日本物理学会講演概要集  2009/08
• EuIn₂P₂の圧力効果  [Not invited]

  HIDAKA HIROYUKI, TANAKA ATSUSHI, IKEDA YOICHI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/08
• 重い電子系超伝導体UBe₁₃における超伝導熱平衡磁化測定  [Not invited]

  SHIMIZU YUSEI, IKEDA YOICHI, TEN'YA KEN'ICHI, HAGA YOSHINORI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/08
• UPd₂Si₂の圧力効果  [Not invited]

  TANAKA ATSUSHI, TAKAHASHI SOSUKE, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/08
• NiCrAl製ピストンシリンダーの開発とURu₂Si₂の高圧下磁化測定  [Not invited]

  NISHIKAWA DAICHI, IKEDA YOICHI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/08
• 立方晶希土類化合物R₃Pd₂₀Ge₆(R=Ce,Pr)におけるLa希釈効果  [Not invited]

  WAKABAYASHI TAKUMI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, TEN'YA KEN'ICHI, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/08
• 27aTD-2 Magnetization Measurements of URu_2Si_2 under High Pressure  [Not invited]

  Nishikawa D, Ishihara Y, Takayama S, Hidaka H, Yanagisawa T, Yokoyama M, Amitsuka H, Kreitlow Jan, Sullow Stefan

  Meeting abstracts of the Physical Society of Japan  2009/03
• 27aTD-3 Elastic Neutron Scattering Experiment on URu_2Si_2 under Uniaxial Stress  [Not invited]

  Ikeda Y, Yokoyama M, Nishikawa D, Hidaka H, Yanagisawa T, Tenya K, Kawarazaki S, Sato T. J, Yoshizawa H, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/03
• 27aTD-5 Weak Magnetism of Uranium Compounds Studied by Resonant X-ray Scattering Measurements  [Not invited]

  Amitsuka H, Takayama S, Ikeda Y, Kawasaki I, Hidaka H, Yanagisawa T, Yokoyama M, Inami T, Haga Y, Homma Y

  Meeting abstracts of the Physical Society of Japan  2009/03
• 27aTD-6 Systematic Study of Crystalline-Electric-Field Effect in Dilute Magnetic Systems La_<1-x>R_xRu_2Si_2 (R: Rare Earth; x≤0.1): Part II  [Not invited]

  Morishita A, Hidaka H, Yanagisawa T, Yokoyama M, Tenya K, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/03
• 27aPS-36 Magnetic Clustering and Non-Fermi-Liquid Behavior Accompanying Suppression of Long-Range Ferromagnetic Order in CePt_<1-x>Rh_x  [Not invited]

  Kawasaki I, Hidaka H, Yanagisawa T, Yokoyama M, Tenya K, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/03
• 27aPS-65 Ultrasonic Measurement in a vicinity of ordered phase of URu_2Si_2  [Not invited]

  Yanagisawa T, Saito H, Mayama T, Hiroyuki H, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/03
• 27aPS-71 Development of High-Pressure Cell for Very-Low-Temperature Magnetization Measurement  [Not invited]

  Shimizu Y, Hidaka H, Takahashi S, Nishikawa D, Kawasaki I, Yanagisawa T, Amitsuka H, Tenya K

  Meeting abstracts of the Physical Society of Japan  2009/03
• 27aPS-76 Electrical resistivity measurement under high pressure on EuIn_2P_2  [Not invited]

  Hidaka H, Tanaka A, Ikeda Y, Kawasaki I, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2009/03
• 27aPS-87 Structure analysis of Pr_3Pd_<20>Ge_6 in low temperature and magnetic field  [Not invited]

  Wakabayashi T, Kawasaki I, Hidaka H, Amitsuka H, Yanagisawa T, Yokoyama M, Tenya K

  Meeting abstracts of the Physical Society of Japan  2009/03
• URu₂Si₂の高圧下磁化測定  [Not invited]

  NISHIKAWA DAICHI, ISHIHARA YUKO, TAKAYAMA SHIGEKI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, AMITSUKA HIROSHI, KREITLOW JAN, SULLOW STEFAN

  日本物理学会講演概要集  2009/03
• Pr₃Pd₂₀Ge₆の低温磁場中構造解析  [Not invited]

  WAKABAYASHI TAKUMI, KAWASAKI IWATO, HIDAKA HIROYUKI, AMITSUKA HIROSHI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, TEN KEN'ICHI

  日本物理学会講演概要集  2009/03
• URu₂Si₂の秩序相近傍における超音波測定  [Not invited]

  YANAGISAWA TATSUYA, SAITO HITOSHI, MAYAMA TAICHI, HIDAKA HIROYUKI, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/03
• 極低温磁化測定用インデンターセルの開発 II  [Not invited]

  SHIMIZU YUSEI, HIDAKA HIROYUKI, TAKAHASHI SOSUKE, NISHIKAWA DAICHI, KAWASAKI IKUTO, YANAGISAWA TATSUYA, AMITSUKA HIROSHI, TEN'YA KEN'ICHI

  日本物理学会講演概要集  2009/03
• URu₂Si₂における一軸応力下弾性中性子散乱実験  [Not invited]

  IKEDA YOICHI, YOKOYAMA MAKOTO, NISHIKAWA DAICHI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, TEN'YA KEN'ICHI, KAWARAZAKI SHUZO, SATO TAKASHI, YOSHIZAWA HIDEKI, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/03
• 磁性希釈極限系La_1‐xR_xRu₂Si₂(R: 希土類; x≦0.1)における結晶場効果の系統的研究II  [Not invited]

  MORISHITA AKIRA, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, TEN'YA KEN'ICHI, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/03
• 共鳴X線散乱によるウラン化合物の微弱磁性の観測  [Not invited]

  AMITSUKA HIROSHI, TAKAYAMA SHIGEKI, IKEDA YOICHI, KAWASAKI IWATO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, INAMI TOSHIYA, HAGA YOSHINORI, HONMA YOSHIYA

  日本物理学会講演概要集  2009/03
• CePt_1‐xRh_xの強磁性長距離秩序の抑制に伴う磁気クラスター形成および非フェルミ液体異常  [Not invited]

  KAWASAKI IKUTO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, TEN'YA KEN'ICHI, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/03
• EuIn₂P₂における高圧下電気抵抗測定  [Not invited]

  HIDAKA HIROYUKI, TANAKA ATSUSHI, IKEDA YOICHI, KAWASAKI IKUTO, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2009/03
• CePt_1-xRh_xの強磁性長距離秩序の抑制に伴う磁気クラスター形成および非フェルミ液体異常

  川崎郁斗, 日高宏之, 柳澤達也, 横山淳, 天谷健一, 網塚浩

  日本物理学会講演概要集  2009
• 磁性希釈極限系La_1-xR_xRu₂Si₂(R: 希土類; x≦0.1)における結晶場効果の系統的研究II

  森下明, 日高宏之, 柳澤達也, 横山淳, 天谷健一, 網塚浩

  日本物理学会講演概要集  2009
• 21aPS-11 Ultrasonic Dispersion in the Filled-Skutterudite Pr_<0.55>Nd<0.45>Os_4Sb_<12>  [Not invited]

  Yanagisawa T, Mayama T, Morishita A, Hidaka H, Amitsuka H, Yamaguchi A, Nemoto Y, Goto T, Takeda N, Ho Pei-Chun, Maple M. Brian

  Meeting abstracts of the Physical Society of Japan  2008/08
• 21aPS-50 Specific heat of EuIn_2P_2 at high magnetic fields  [Not invited]

  Hidaka H, Ikeda Y, Kawasaki I, Yanagisawa T, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2008/08
• 21aPS-57 Field Induce Phase Transition on Clathrate Compound Pr_3Pd_<20>Ge_6 II  [Not invited]

  Wakabayashi T, Kawasaki I, Morishita A, Hidaka H, Amitsuka H, Yanagisawa T, Yokoyama M, Tenya K

  Meeting abstracts of the Physical Society of Japan  2008/08
• 21aPS-101 Heat Capacity Measurement for URu_2Si_2 Under High Pressure  [Not invited]

  Ikeda Y, Tanaka A, Takayama S, Ishihara Y, Hidaka H, Yanagisawa T, Yokoyama M, Tenya K, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2008/08
• 21aPS-102 Magnetization Measurements under Hydrostatic Pressureon URu_2Si_2 II  [Not invited]

  Ishihara Y, Takayama S, Morishita A, Hidaka H, Amitsuka H, Yanagisawa T, Tenya K, Yokoyama M, Kreitlow Jan, Sullow Stefan, Sawai Y, Kindo K, Honma Y

  Meeting abstracts of the Physical Society of Japan  2008/08
• 21aPS-110 Development of High-Pressure Cell for Very-Low-Temperature Magnetization Measurement  [Not invited]

  Shimizu Y, Hidaka H, Nishikawa D, Kawasaki I, Yanagisawa T, Amitsuka H, Tenya K, Haga Y, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2008/08
• 22pQC-12 Magnetic properties and ferromagnetic quantum critical behavior of CePt_<1-x>Rh_x  [Not invited]

  Kawasaki I, Nishikawa D, Hidaka H, Yanagisawa T, Yokoyama M, Tenya K, Amitsuka H

  Meeting abstracts of the Physical Society of Japan  2008/08
• Pr₃Pd₂₀Ge₆の磁場誘起相転移 II  [Not invited]

  WAKABAYASHI TAKUMI, KAWASAKI IKUTO, MORISHITA AKIRA, HIDAKA HIROYUKI, AMITSUKA HIROSHI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, TEN'YA KEN'ICHI

  日本物理学会講演概要集  2008/08
• 充填スクッテルダイトPr_0.55Nd_0.45Os₄Sb₁₂の超音波分散  [Not invited]

  YANAGISAWA TATSUYA, MAYAMA TAICHI, MORISHITA AKIRA, HIDAKA HIROYUKI, AMITSUKA HIROSHI, YAMAGUCHI AKIO, NEMOTO YUICHI, GOTO TERUTAKA, TAKEDA NAOYA, HO PEI-CHUN, MAPLE M.BRIAN

  日本物理学会講演概要集  2008/08
• EuIn₂P₂における磁場中比熱測定  [Not invited]

  HIDAKA HIROYUKI, IKEDA YOICHI, KAWASAKI IKUTO, YANAGISAWA TATSUYA, AMITSUKA HIROSHI

  日本物理学会講演概要集  2008/08
• 極低温磁化測定用高圧セルの開発  [Not invited]

  SHIMIZU YUSEI, HIDAKA HIROYUKI, NISHIKAWA DAICHI, KAWASAKI IKUTO, YANAGISAWA TATSUYA, AMITSUKA HIROSHI, TEN'YA KEN'ICHI, HAGA YOSHINORI, ONUKI YOSHICHIKA

  日本物理学会講演概要集  2008/08
• CePt_1-xRh_xの磁性状態と強磁性量子臨界現象  [Not invited]

  KAWASAKI IKUTO, NISHIKAWA DAICHI, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, TEN'YA KEN'ICHI, AMITSUKA HIROSHI

  日本物理学会講演概要集  2008/08
• URu₂Si₂における静水圧下磁化測定 II  [Not invited]

  ISHIHARA YUKO, TAKAYAMA SHIGETAKA, MORISHITA AKIRA, HIDAKA HIROYUKI, AMITSUKA HIROSHI, YANAGISAWA TATSUYA, TEN'YA KEN'ICHI, YOKOYAMA MAKOTO, KREITLOW JAN, SUELLOW STEFAN, SAWAI YASUTSUKA, KINDO KOICHI, HONMA YOSHIYA

  日本物理学会講演概要集  2008/08
• URu₂Si₂の圧力下比熱測定  [Not invited]

  IKEDA YOICHI, TANAKA ATSUSHI, TAKAYAMA SHIGETAKA, ISHIHARA YUKO, HIDAKA HIROYUKI, YANAGISAWA TATSUYA, YOKOYAMA MAKOTO, TEN'YA KEN'ICHI, AMITSUKA HIROSHI

  日本物理学会講演概要集  2008/08
• Specific heat of EuIn₂P₂ at high magnetic fields  [Not invited]

  H. Hidaka, Y. Ikeda, I. Kawasaki, T. Yanagisawa, H. Amitsuka

  Strongly Correlated Electon Systems 2008  2008/08  Buzios, Brazil  SCES
  
• 23pPSB-41 Magnetization Measurements under Hydrostatic Pressure on URu_2Si_2  [Not invited]

  Ishihara Y, Takayama S, Morishita A, Hidaka H, Amitsuka H, Yokoyama M, Tenya K, Kreitlow Jan, Sullow Stefan

  Meeting abstracts of the Physical Society of Japan  2008/02
• 23pPSA-43 Pressure effect of CePtZn  [Not invited]

  Toda Y, Hidaka H, Kotegawa H, Kobayashi T.C, Dhar S.K, Kulkarni R, Manfrinetti P

  Meeting abstracts of the Physical Society of Japan  2008/02
• 23pPSA-18 Unusual ordered state under pressures in SmOs_4Sb_<12>  [Not invited]

  Tabira K, Hidaka H, Kotegawa H, Kobayasi T.C, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2008/02
• SmOs₄Sb₁₂における圧力下の異常な秩序状態  [Not invited]

  TABIRA KEISUKE, HIDAKA HIROYUKI, KOTEGAWA HISASHI, KOBAYASHI TATSUO, KIKUCHI DAISUKE, SUGAWARA HITOSHI, SATO HIDEYUKI

  日本物理学会講演概要集  2008/02
• URu₂Si₂の静水圧下磁化測定  [Not invited]

  ISHIHARA YUKO, TAKAYAMA SHIGEKI, MORISHITA AKIRA, HIDAKA HIROYUKI, AMITSUKA HIROSHI, YOKOYAMA ATSUSHI, TEN'YA KEN'ICHI, KREITLOW JAN, SUELLOW STEFAN

  日本物理学会講演概要集  2008/02
• CePtZnの圧力効果  [Not invited]

  TODA YOHEI, HIDAKA HIROYUKI, KOTEGAWA HISASHI, KOBAYASHI TATSUO, DHAR S. K, KULKARNI R, MANFRINETTI P

  日本物理学会講演概要集  2008/02
• LiV₂O₄の低温高圧下粉末X線回折  [Not invited]

  TAKEDA KEIKI, HIDAKA HIROYUKI, HORI AKIHIRO, KOTEGAWA HISASHI, KOBAYASHI TATSUO, MIYOSHI KIYOTAKA, FUJIWARA KENJI, TAKEUCHI JUN, OISHI YASUO

  高圧討論会講演要旨集  2007/11  高圧学会
  
• Disappearance of Pressure-induced Metal-Insulator Transition in Pr(Fe_0.95Ru_0.05)₄P₁₂  [Not invited]

  H. Hidaka, Y. Toda, H, Kotegawa, T.C. Kobayashi, Y. Motomura, Y. Aoki, D. Kikuchi, H. Sato

  International Conference on "New Quantum Phenomena in Skutterudite and Related Systems"  2007/09  Kobe, Japan
• 21pPSB-10 Magnetization and specific heat measurements at high pressures in SmOs_4Sb_<12>  [Not invited]

  Tabira K, Hidaka H, Kotegawa H, Kobayasi T. C, Kikuti D, Tanaka K, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2007/08
• 22pXA-14 Relationship between pressure-induced 1st order phase transition and superconductivity  [Not invited]

  Kotegawa E, Hori A, Irie Y, Hidaka H, Kobayashi T. C, Akazawa T, Yamamoto E, Ikeda S, Haga Y, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2007/08
• 21aPS-109 Powder x-ray diffraction study of LiV_2O_4 under high pressure and low temperature  [Not invited]

  Takeda K, Hidaka H, Hori A, Kotegawa H, Kobayashi T.C, Miyoshi K, Fujiwara K, Takeuchi J, Ohishi Y

  Meeting abstracts of the Physical Society of Japan  2007/08
• 21aXA-1 Electrical resistivity and AC-susceptibility measurements on Pr(Fe_<0.95>Ru_<0.05>)_4P_<12> under high pressure  [Not invited]

  Hidaka H, Toda Y, Kotegawa H, Kobayashi T. C, Motomura Y, Aoki Y, Kikuchi D, Sato H

  Meeting abstracts of the Physical Society of Japan  2007/08
• 21pPSB-6 Observation of Charge Fluctuations in Skutterudite Compounds through NQR Measurements  [Not invited]

  Irie Y, Kotegawa H, Hidaka H, Kobayashi T. C, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2007/08
• SmOs₄Sb₁₂における高圧下磁化,比熱測定  [Not invited]

  TAHIRA KEISUKE, HIDAKA HIROYUKI, KOTEGAWA HISASHI, KOBAYASHI TATSUO, KIKUCHI DAISUKE, TANAKA KEN'YA, SUGAWARA HITOSHI, SATO HIDEYUKI

  日本物理学会講演概要集  2007/08
• スクッテルダイト化合物におけるNQRによる電荷揺らぎの観測  [Not invited]

  IRIE YUTA, KOTEGAWA HISASHI, HIDAKA HIROYUKI, KOBAYASHI TATSUO, KIKUCHI DAISUKE, SUGAWARA HITOSHI, SATO HIDEYUKI

  日本物理学会講演概要集  2007/08
• LiV₂O₄の低温高圧下粉末X線回折  [Not invited]

  TAKEDA KEIKI, HIDAKA HIROYUKI, HORI AKIHIRO, KOTEGAWA HISASHI, KOBAYASHI TATSUO, MIYOSHI KIYOTAKA, FUJIWARA KENJI, TAKEUCHI JUN, OISHI YASUO

  日本物理学会講演概要集  2007/08
• Pr(Fe_0.95Ru_0.05)₄P₁₂の高圧下電気抵抗及び交流帯磁率測定  [Not invited]

  HIDAKA HIROYUKI, TODA YOHEI, KOTEGAWA HISASHI, KOBAYASHI TATSUO, MOTOMURA YOKO, AOKI YUJI, KIKUCHI DAISUKE, SATO HIDEYUKI

  日本物理学会講演概要集  2007/08
• UIrにおける圧力誘起一次相転移と超伝導の関係  [Not invited]

  KOTEGAWA HISASHI, HORI AKIHIRO, IRIE YUTA, HIDAKA HIROYUKI, KOBAYASHI TATSUO, AKAZAWA TERUHIKO, YAMAMOTO ETSUSHI, IKEDA SHUGO, HAGA YOSHINORI, ONUKI YOSHICHIKA

  日本物理学会講演概要集  2007/08
• 21aWK-2 ^<121,123>Sb-NQR study in SmOs_4Sb_<12>  [Not invited]

  Kotegawa H, Hidaka H, Irie Y, Kobayashi T. C, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2007/02
• 20pWP-13 Superconducting Phase-Diagram under Pressure in CeRh_<1-x>Ir_xIn_5  [Not invited]

  Wada N, Kotegawa H, Fukushima S, Hidaka H, Kobayashi T. C, Shishido H, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2007/02
• 18pPSB-7 Coexistence of ferromagnetism and superconductivity in UIr : AC-susceptibility measurement under high pressure  [Not invited]

  Fukushima S, Kotegawa H, Hidaka H, Kobayashi T.C, Akazawa T, Yamamoto E, Ikeda S, Haga Y, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2007/02
• 18pPSB-6 Anomalous enhancement of residual resistivity in pressure-induced superconductor UIr  [Not invited]

  Hori A, Hidaka H, Kotegawa H, Kobayashi T. C, Akazawa T, Ikeda S, Haga Y, Yamamoto E, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2007/02
• 18pPSB-5 Pressure dependence of Electrical Resistivity in UIr  [Not invited]

  Akazawa T, Hidaka H, Kotegawa H, Fukushima S, Hori A, Kobayashi T. C, Yamamoto E, Haga Y, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2007/02
• Powder X-ray diffraction under pressure in LiV2O4  [Not invited]

  T.C. Kobayashi, H. Kotegawa, H. Hidaka, K. Takeda, Y. Ooishi

  SPring-8 User Experiment Report, (2007A)  2007
• PrFe₄P₁₂の圧力誘起金属―絶縁体転移  [Not invited]

  KOBAYASHI TATSUO, HIDAKA HIROYUKI, WADA NAOKI, KOTEGAWA HISASHI, KIKUCHI DAISUKE, SATO HIDEYUKI, SUGAWARA HITOSHI

  高圧討論会講演要旨集  2006/10  高圧学会
  
• Antiferromagnetically ordered insulating phase under high pressure in PrFe₄P₁₂  [Not invited]

  H. Hidaka, H. Kotegawa, T. C. Kobayashi, K. Fujiwara, D. Kikuchi, H. Sugawara, H. Sato

  International Conference on Magnetism 2006  2006/08  Kyoto, Japan  International Conference on Magnetism
  
• 24pYA-3 Pressure-induced superconductivity in a ferromagnet UIr  [Not invited]

  Kobayashi T.C, Hori A, Fukushima S, Hidaka H, Kotegawa H, Akazawa T, Settai R, Ikeda S, Yamamoto E, Haga Y, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2006/08
• 25pYA-1 ^<121,123>Sb-NMR/NQR study in SmOs_4Sb_<12>  [Not invited]

  Kotegawa H, Hidaka H, Kobayashi T.C, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2006/08
• 25aYA-3 A study of the pressure-induced insulating phase on PrFe_4P_<12>  [Not invited]

  Hidaka H, Wada N, Kotegawa H, Kobayashi T.C, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2006/08
• 23pPSA-52 Superconducting Phase-Diagram under Pressure in CeRh_<1-x>Ir_xIn_5  [Not invited]

  Wada N, Kotegawa H, Hidaka H, Kobayashi T.C, Shishido H, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2006/08
• 29pPSA-51 Abnormal increase of residual resistivity in multi-ferromagnet UIr  [Not invited]

  Hori A, Hidaka H, Kotegawa H, Kobayashi T.C, Akazawa T, Ikeda S, Haga Y, Yamamoto E, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2006/03
• 29pRA-13 Pressure effect of CeNiGe_3 and CeNi_2Ge_2  [Not invited]

  Miyoshi T, Takeda K, Fukushima S, Hidaka H, Kotegawa H, Kobayashi T.C, Nakashima M, Thamizhavel A, Settai R, Onuki Y, Kawasaki S, Kitaoka Y, Fukuhara T, Maezawa K, Itoh K

  Meeting abstracts of the Physical Society of Japan  2006/03
• 27aUB-5 Sb-NQR study in SmOs_4Sb_<12>  [Not invited]

  Kotegawa H, Hidaka H, Kobayashi T.C, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2006/03
• 27aPS-7 Coexistence of ferromagnetism and superconductivity in UIr : AC-susceptibility measurement under high pressure  [Not invited]

  Fukushima S, Kotegawa H, Hidaka H, Kobayashi T.C, Akazawa T, Ikeda S, Yamamoto E, Haga Y, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2006/03
• PrFe₄P₁₂の圧力誘起金属-絶縁体転移

  小林達生, 日高宏之, 和田直希, 小手川恒, 菊地大輔, 佐藤英行, 菅原仁

  高圧討論会講演要旨集  2006
• Magnetic property of pressure-induced insulating-state in PrFe₄P₁₂  [Not invited]

  H. Hidaka, H. Kotegawa, T. C. Kobayashi, K. Fujiwara, D. Kikuchi, H. Sugawara, H. Sato

  Joint Workshop on NQP-skutterudites and NPM in multi-approach  2005/11  Hachioji, Japan
• 20aYG-3 Superconductivity in antifferomagnetic state of CeNiGe_3  [Not invited]

  Miyoshi T, Takeda K, Fukushima S, Hidaka H, Kotegawa H, Kobayashi T, Tabata K, Nakashima M, Thamizhavel A, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2005/08
• 19pPSA-81 Study of erectrical resistivity anormalies and Fermi surface of RAgSb_2(R=Ce, La)  [Not invited]

  Watanabe Y, Inada Y, Nogami Y, Hidaka H, Kotegawa H, Kobayashi T. C

  Meeting abstracts of the Physical Society of Japan  2005/08
• 22aXD-8 Anisotropy on electrical conduction for multi-ferromagnetic phases under high pressure In UIr  [Not invited]

  Hori A, Hidaka H, Kotegawa H, Kobayashi T. C, Akazawa T, Ikeda S, Haga Y, Yamamoto E, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2005/08
• 22aXD-9 Coexistence of ferromagnetism and superconductivity In UIr : AC-susceptibility measurement under high pressure  [Not invited]

  Fukushima S, Kotegawa H, Hidaka H, Kobayashi T. C, Akazawa T, Ikeda S, Haga Y, Yamamoto E, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2005/08
• 22aYG-7 A study of the pressure-induced insulating phase in PrFe_4P_<12>  [Not invited]

  Hidaka H, Fukushima S, Hori A, Kotegawa H, Kobayashi T. C, Fujiwara K, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2005/08
• 24aTA-2 Pressure dependence of the unit cell volume in CeCu_2Ge_2 at low temperature  [Not invited]

  Takeda K, Kobayashi C, Hidaka H, Shimizu K, Adachi T, Ohishi Y, Takata M, Watanuki T, Shimomura S, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2005/03
• 24aTA-4 Pressure-induced superconductivity in CeNiGe_3  [Not invited]

  Thamizhavel A

  Meeting abstracts of the Physical Society of Japan  2005/03
• 25aPS-7 Powder X-ray Diffraction Study on UIr under Quasi-Hydrostatic Pressure  [Not invited]

  Akazawa T, Hidaka H, Takeda K, Kotegawa H, Fukushima S, Hori A, Kobayashi T. C, Ohishi Y, Yamamoto E, Haga Y, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2005/03
• 25aPS-8 AC-Susceptlbility on Ferromagnetic Superconductor UIr without Inversion Symmetry  [Not invited]

  Fukushima S, Kotegawa H, Hidaka H, Kobayashi T.C, Akazawa T, Ikeda S, Haga Y, Yamamoto E, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2005/03
• 25aPS-9 Anisotropy on electrical conduction under high pressure in UIr  [Not invited]

  Hori A, Hidaka H, Kotegawa H, Kobayashi T. C, Akazawa T, IkedaS, Haga Y, Yamamoto E, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2005/03
• 25aPS-27 Hall effect in the pressure-induced insulating state of PrFe_4P_<12>  [Not invited]

  Hidaka H, Hori A, Kotegawa H, Kobayashi T. C, Harima H, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2005/03
• 25aPS-63 Anisotropy on RAgSb_2(R=Ce,La)  [Not invited]

  Watanabe Y, Inada Y, Hidaka H, Kotegawa H, Kobayashi T.C, Matsuda T.D, Aoki D

  Meeting abstracts of the Physical Society of Japan  2005/03
• 25pTA-11 ^<31>P-NMR Study on Pressure Induced Insulating State in PrFe_4P_<12>  [Not invited]

  Kotegawa H, Shimaoka Y, Hidaka H, Miki T, Kobayashi T, Fujiwara K, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2005/03
• 14pPSA-74 Pressure effect on SmOs_4Sb_12  [Not invited]

  Kotegawa H, Miki T, Hidaka H, Kobayashi T C, Kikuchi D, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2004/08
• 15aRD-4 Superconductivity around a ferromagnetic quantum critical point in UIr without inversion symmetry  [Not invited]

  Akazawa T, Hidaka H, Kotegawa H, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2004/08
• 15aRD-5 Magnetization measurement of UIr under high pressure  [Not invited]

  Hidaka H, Akazawa T, Kotegawa H, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2004/08
• 14pPSA-35 AC-Susceptibility on Ferromagnetic Superconductor Ulr without inversion Symmetry  [Not invited]

  Kotegawa H, Fukushima S, Hidaka H, Kobayashi T C, Akazawa T, Haga Y, Yamamoto E, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2004/08
• 14pPSA-59 Pressure-induced metal-insulator transition in PrFe_4P_<12> II  [Not invited]

  Hidaka H, Hori A, Kotegawa H, Kobayashi T C, Harima H, Kobayashi M, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2004/08
• Pressure-induced metal-insulator transition in the filled skutterudite PrFe₄P₁₂  [Not invited]

  H. Hidaka, I. Ando, H. Kotegawa, T. C. Kobayashi, H. Harima, M. Kobayashi, H. Sugawara, H. Sato

  Strongly Correlated Electon Systems 2011  2004/07  Karlsruhe, Germany  SCES
  
• Pressure-induced metal-insulator transition in the filled skutterudite PrFe₄P₁₂  [Not invited]

  H. Hidaka, I. Ando, H. Kotegawa, T. C. Kobayashi, H. Harima, M. Kobayashi, H. Sugawara, H. Sato

  Japan-France Seminor  2004/07  Grenoble, France
• 28aXD-12 Magnetization measurement of UIr under high preasure  [Not invited]

  Hidaka H, Akazawa T, Kobayashi T. C, Yamamoto E, Haga Y, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2004/03
• 28aXD-13 Pressure Induced Superconductivity in UIr without inversion symmetry  [Not invited]

  Akazawa T, Hidaka H, Fujiwara T, Kobayashi T C, Yamamoto E, Haga Y, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2004/03
• 28pPSA-34 Pressure-induced metal-insulator transition in the filled skutterudite PrFe_4P_<12>  [Not invited]

  Hidaka H, Kotegawa H, Kobayashi T. C, Ando I, Harima H, Kobayashi M, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2004/03
• 高圧下におけるLiV₂O₄の粉末X線回折  [Not invited]

  TAKEDA KEIKI, HIDAKA HIROYUKI, KOBAYASHI TATSUO, SHIMIZU KATSUYA, HARIMA HISATOMO, MIYOSHI KIYOTAKA, NISHIBORI EIJI, ADACHI TAKAFUMI, WATANUKI TOORU

  高圧討論会講演要旨集  2003/11  高圧学会
  
• Electrical Resistivity Mesurements of Filled Skutterudite PrFe_4P_<12> under high pressure  [Not invited]

  Ando I, Tabata K, Kobayashi T. C, Hidaka H, Harima H, Kobayashi M, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2003/08
• Magnetic Mesurement of PrFe_4P_<12> under High Pressure  [Not invited]

  Hidaka H, Ando I, Tabata K, Shimizu K, Kobayashi T. C, Harima H, Kobayashi M, Sugawara H, Sato H

  Meeting abstracts of the Physical Society of Japan  2003/08
• Phase Diagram of UIr under Quasi-Hydrostatic Pressure  [Not invited]

  Akazawa T, Hidaka H, Tabata K, Kobayashi T. C, Yamamoto E, Haga Y, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2003/08
• Pressure-induced charge-ordering in LiV_2O_4 II  [Not invited]

  Takeda K, Hidaka H, Kobayashi T. C, Shimizu K, Miyoshi K, Fujiwara K, Takeuchi J, Nishibori E, Takata M, Sakata M, Adachi T, Ohishi Y, Watanuki T, Shimomura O

  Meeting abstracts of the Physical Society of Japan  2003/08
• Powder X-ray diffractions under low temperature and high pressure for pressure-induced superconductors in Ce compounds  [Not invited]

  Takeda K, Adachi T, Kobayashi C, Shimizu K, Hidaka H, Takao D, Nishibori E, Takata M, Sakata M, Ohishi Y, Watanuki T, Shimomura O, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2003/03
• Pressure Dependence of the Magnetization in the Itinerant Ferromagnet Ulr  [Not invited]

  Hidaka H, Kobayashi T. C, Yamamoto E, Haga Y, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2003/03
• α‐Mnの反強磁性秩序の圧力効果 II  [Not invited]

  MIYAKE ATSUSHI, TAKEDA KEIKI, TAKAO DAIGORO, HIDAKA HIROYUKI, SHIMIZU KATSUYA, KOBAYASHI TATSUO, OISHI YASUO, NISHIHORI EIJI, SHIMOMURA OSAMU

  高圧討論会講演要旨集  2002/11  高圧学会
  
• LiV₂O₄の圧力誘起電荷整列  [Not invited]

  TAKEDA KEIKI, KOBAYASHI TATSUO, SHIMIZU KATSUYA, HIDAKA HIROYUKI, FUJIWARA KENJI, TAKEUCHI JUN, NISHIBORI EIJI, SAKATA MAKOTO, SHIMOMURA OSAMU

  高圧討論会講演要旨集  2002/11  高圧学会
  
• Electrical resistance measurement in BaVS3 under pressure  [Not invited]

  Hidaka H, Kobayashi T.C, Yamasaki T, Nakamura H, Shiga M

  Meeting abstracts of the Physical Society of Japan  2002/08
• 27aYK-2 Pressure-induced charge-ordering in LiV_2O_4  [Not invited]

  Takeda K, Shimizu K, Ishikawa H, Tanaka M, Furomoto S, Hidaka H, Takao D, Kobayashi T. C, Miyoshi K, Fujiwara K, Takeuchi J, Nishibori E, Takata M, Sakata M, Ohishi Y, Watanuki T, Shimomura O

  Meeting abstracts of the Physical Society of Japan  2002/03
• α-Mnの反強磁性秩序の圧力効果 II

  三宅厚志, 武田圭生, 鷹尾大五郎, 日高宏之, 清水克哉, 小林達生, 大石泰生, 西堀英治, 下村理

  高圧討論会講演要旨集  2002
• CeCoIn₅の圧力下の物性  [Not invited]

  中脇 宙一, 宍戸 寛明, 日高 宏之, 藤原 旅人, 赤澤 輝彦, 小林 達生, 摂待 力生, 大貫 惇睦

  日本物理学会  2001/09  日本物理学会
  
• Physical Properties in CeCoIn_5 under pressure  [Not invited]

  Nakawaki H, Shishido H, Hidaka H, Fujiwara T, Akazawa T, Kobayashi T, Settai R, Onuki Y

  Meeting abstracts of the Physical Society of Japan  2001/09

Association Memberships

• THE PHYSICAL SOCIETY OF JAPAN   THE JAPAN SOCIETY OF HIGH PRESSURE SCIENCE AND TECHNOLOGY   

Research Projects

• Verification of electric toroidal quadrupole order by magnetopiezoelectric effect

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

  Date (from‐to) : 2020/04 -2023/03 

  Author : 日高 宏之

   

  固体中における多彩な秩序状態は一般に、電荷・磁荷分布の異方性を特徴づける「多極子」で表現することが出来る。特に、結晶構造に空間反転対称性を持たない固体中では、空間反転操作に対して奇関数となる「奇パリティ多極子」が秩序し、通常の金属では発生しえない物理応答、例えば電流によって誘起される結晶格子の歪みなどが観測される可能性がある。本研究では、この奇パリティ多極子秩序の一種である「電気トロイダル四極子秩序」に起因した「電流誘起格子歪み」を観測することを目的とし、局所的に空間反転対称性を持たない金属磁性体における実験的検証を行っている。 2021年度には、昨年度構築した電流格子歪み観測のための「多重環境下熱膨張測定システム」をさらに改良し、そのシステムを用いて実際に電気トロイダル四極子秩序候補物質Cd2Re2O7およびCeCoSiにおける低温・磁場・電流下熱膨張測定を行った。Cd2Re2O7においては、低温秩序状態においてのみ、電気トロイダル四極子秩序に関連すると考えられる電流・磁場誘起格子歪みの発現を初めて発見した。CeCoSiにおいては、電流誘起歪みはこれまでのところ観測されていないが、磁場中各種バルク物性測定とそれらの結果から作成した磁気相図から、本物質の特異な低温秩序状態の解明にとって重要な情報を得た。また、CeCoSiの高圧下熱膨張測定のための準備が完了し、来年度からは高圧下での測定へと着手する予定である。 また上記の研究に加えて、局所的に空間反転対称性を持たない金属磁性体である希土類系RBe13の磁性やウラン系化合物における基本物性と電流誘起磁化の研究など、他の物質系への研究対象の拡張も行っている。
• Experimental Tests for Current-Induced Magnetic Effect in Magnetic Metals with Toroidal Moments

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

  Date (from‐to) : 2015/04 -2018/03 

  Author : AMITSUKA Hiroshi, AMITSUKA Hiroshi, HDAK Hiroyuki, SAITO Hiraku, SHIKANAI Nana, YAMAMOTO Masataka, NAKAO Hironori, TABATA Chihiro, TANIDA Hiroshi, SERA Masafumi, MATSUMURA Takeshi, SECHOVSKÝ Vladimir, UHLíŘOVÁ Klára, VALIŠKA Michal, ZHERLITSYN Sergei, WOSNITZA Jochen, SÜLLOW Stefan

   

  This project aimed at testing experimentally for a new electromagnetic effect that was theoretically predicted in a magnetic metal showing order of “toroidal moment”, which corresponds to a vertex-like configuration of electron spins. We performed magnetization measurements under electric currents on a layered uranium compound, UNi4B, which was expected to be a realistic candidate for the theoretical prediction, and observed that uniform magnetization is induced in proportion to the strength of applied electric currents. The obtained experimental results have shown the essential validity of the theoretical prediction. However, we also found that there is an inconsistency between the theory and the experimental results regarding the current-direction dependence of magnetization, raising a new issue of reinvestigation of crystal and magnetic structure of this system. In addition to these, we found two new antiferromagnetic materials that show the similar electromagnetic effect.
• Ultrasonic Investigation of Composite Quantum Degrees of Freedom arise from High-symmetrical Cagelike Crystal Structure

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

  Date (from‐to) : 2014/04 -2017/03 

  Author : Yanagisawa Tatsuya, AMITSUKA Hiroshi, HIDAKA Hiroyuki, Maple M. Brian, Zherlitsyn S.

   

  Crystalline electric field (CEF) ground state of SmOs_4Sb_12, which shows magnetic field robust heavy fermion state, is determined as Gamma_67 by ultrasonic measurements under pulsed-magnetic field. Further, the results of ultrasonic measurements under hydrostatic pressure on this compound strongly suggests that a magnetic octupolar interaction plays an important role in the low-temperature magnetic ordered phase in SmOs_4Sb_12. On the other hand, the elastic constant (C_11-C_12)/2 of a new cage-structural compound PrNi_2Cd_20, which was grown at Maple group in University of California San Diego, is observed down to 30 mK. It is clarified that this system has Gamma_3 non-Kramers doublet CEF ground state.
• Study of Weak Magnetism and It's Relationship to Hidden Order and Superconductivity in 5f-Electron Systems

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

  Date (from‐to) : 2007 -2009 

  Author : AMITSUKA Hiroshi, TENYA Kenichi, HIDAKA Hiroyuki, YANAGISAWA Tatsuya

   

  We have obtained, for the first time, microscopic evidence that weak antiferromagnetism of the 5f-electron superconductor URu_2Si_2 is ascribed to an inhomogeneous antiferromagetic order induced by a residual stress in a crystal. We have further shown that the superconductivity of this system does not coexist with the antiferromagnetism but does occur only in the unknown ordered state called "hidden order". Some new findings have also been obtained from the study of related materials, regarding electronic properties in the vicinity of quantum phase transitions and magnetism of 5f-electron systems.