Publications (75)
Magnetostriction studies up to megagauss fields using fiber Bragg grating technique
Akihiko Ikeda, Yasuhiro H. Matsuda, Daisuke Nakamura +13
Magnetization Plateaus in the Spin-1/2 Kagome Antiferromagnets: Volborthite and Vesignieite
Yoshihiko Okamoto, Masashi Tokunaga, Hiroyuki Yoshida +3
Precise Control of Band Filling in NaxCoO2
Daisuke Yoshizumi, Yuji Muraoka, Yoshihiko Okamoto +5
Breathing Pyrochlore Lattice Realized in A-Site Ordered Spinel Oxides LiGaCr4O8 and LiInCr4O8
Yoshihiko Okamoto, Gøran J. Nilsen, J. Paul Attfield +1
New beta-Pyrochlore Oxide Superconductor CsOs2O6
Shigeki Yonezawa, Yuji Muraoka, Zenji Hiroi
High-pressure Raman study on the superconducting pyrochlore oxide Cd2Re2O7
Yasuhito Matsubayashi, Takumi Hasegawa, Norio Ogita +2
NaCuMoO_4(OH) as a Candidate Frustrated J_1-J_2 Chain Quantum Magnet
Kazuhiro Nawa, Yoshihiko Okamoto, Akira Matsuo +9
Superconductivity in an Einstein Solid AxV2Al20 (A = Al and Ga)
Atsushi Onosaka, Yoshihiko Okamoto, Jun-ichi Yamaura +1
Magnetic State Selected by Magnetic Dipole Interaction in Kagome Antiferromagnet NaBa$_{2}$Mn$_{3}$F$_{11}$
Shohei Hayashida, Hajime Ishikawa, Yoshihiko Okamoto +7
Orbital Arrangements and Magnetic Interactions in the Quasi-One-Dimensional Cuprates ACuMoO_4(OH) (A = Na, K)
Kazuhiro Nawa, Takeshi Yajima, Yoshihiko Okamoto +1
Observation of Magnetic Monopoles in Spin Ice
Hiroaki Kadowaki, Naohiro Doi, Yuji Aoki +5
Spinodal Decomposition in the TiO2-VO2 System
Zenji Hiroi, Hiroaki Hayamizu, Toru Yoshida +4
Rattling-Induced Superconductiviy in the Beta-Pyrochlore Oxides AOs2O6
Yohei Nagao, Jun-ichi Yamaura, Hiroki Ogusu +2
Successive Symmetry Breaking in a Jeff = 3/2 Quartet in the Spin-Orbit Coupled Insulator Ba2MgReO6
Daigorou Hirai, Zenji Hiroi
Spin reorientation in the square-lattice antiferromagnets RMnAsO (R = Ce, Nd): Density functional analysis of the spin exchange interactions between the rare-earth and transition-metal ions
Changhoon Lee, Erjun Kan, Hongjun Xiang +4
Large Diamagnetism of AV2Al20 (A = Y and La)
Atsushi Onosaka, Yoshihiko Okamoto, Jun-Ichi Yamaura +2
Second Anomaly in the Specific Heat of beta-Pyrochlore Oxide Superconductor KOs2O6
Zenji Hiroi, Shigeki Yonezawa, Jun-Ichi Yamaura +2
Nematic transition and highly two-dimensional superconductivity in BaTi$_2$Bi$_2$O revealed by $^{209}$Bi-nuclear magnetic resonance/nuclear quadrupole resonance measurements
Shunsaku Kitagawa, Kenji Ishida, Wataru Ishii +2
Frustrated Magnetism of Pharmacosiderite Comprising Tetrahedral Clusters Arranged in the Primitive Cubic Lattice
Ryutaro Okuma, Takeshi Yajima, Tatsuo Fujii +2
Emergence of nontrivial magnetic excitations in a spin liquid state of kagome volborthite
Daiki Watanabe, Kaori Sugii, Masaaki Shimozawa +7
$J_1-J_2$ Square-Lattice Heisenberg Antiferromagnets with 4$d^1$ spins: AMoOPO$_4$Cl (A = K, Rb)
Hajime Ishikawa, Nanako Nakamura, Makoto Yoshida +6
Vesignieite BaCu3V2O8(OH)2 as a Candidate Spin-1/2 Kagome Antiferromagnet
Yoshihiko Okamoto, Hiroyuki Yoshida, Zenji Hiroi
Anisotropic Field-Induced Gap in Quasi-One-Dimensional Antiferromagnet KCuMoO$_4$(OH)
Kazuhiro Nawa, Oleg Janson, Zenji Hiroi
Weak ferromagnetic order breaking the threefold rotational symmetry of the underlying kagomé lattice in CdCu$_3$(OH)$_6$(NO$_3$)$_2\cdot$H$_2$O
Ryutaro Okuma, Takeshi Yajima, Daisuke Nishio-Hamane +2
A novel crystal polymorph of volborthite, Cu3V2O7(OH)2 2H2O
Hajime Ishikawa, Jun-ichi Yamaura, Yoshihiko Okamoto +3
Crystal Chemistry and Magnetic Properties of Manganese Zinc Alloy "YMn2Zn20" Comprising a Mn Pyrochlore Lattice
Yoshihiko Okamoto, Takeshi Shimizu, Jun-ichi Yamaura +1
Ferromagnetic Ising Spin Chains Emerging from the Spin Ice under Magnetic Field
Zenji Hiroi, Kazuyuki Matsuhira, Masao Ogata
Distorted Kagome Lattice Generated by a Unique Orbital Arrangement in the Copper Mineral KCu3As2O7(OH)3
Yoshihiko Okamoto, Hajime Ishikawa, Gøran J. Nilsen +1
Synthesis of anti-perovskite-type carbides and nitrides from metal oxides and melamine
Daigorou Hirai, Hidetake Tanaka, Daisuke Nishio-Hamane +1
Magnetic Order in the Spin-1/2 Kagome Antiferromagnet Vesignieite
Makoto Yoshida, Yoshihiko Okamoto, Masashi Takigawa +1
All-in/all-out magnetic domains: X-ray diffraction imaging and magnetic field control
Samuel Tardif, Soshi Takeshita, Hiroyuki Ohsumi +5
Phase diagram of multiferroic KCu$_3$As$_2$O$_7$(OD)$_3$
Gøran J. Nilsen, Virginie Simonet, Claire V. Colin +6
Rattling and Superconducting Properties of the Cage Compound GaxV2Al20
Zenji Hiroi, Atsushi Onosaka, Yoshihiko Okamoto +2
Crystal structure and the magnetic properties of the 5d transition metal oxide AOsO4 (A = K, Rb, Cs)
Jun-ichi Yamaura, Zenji Hiroi
A new macroscopically degenerate ground state in the spin ice compound Dy2Ti2O7 under a magnetic field
Kazuyuki Matsuhira, Zenji Hiroi, Takashi Tayama +2
Itinerant-Electron Magnet of the Pyrochlore Lattice: Indium-Doped YMn2Zn20
Yoshihiko Okamoto, Takeshi Shimizu, Jun-ichi Yamaura +2
Large and homogeneous mass enhancement in the rattling-induced superconductor KOs$_2$O$_6$
Taichi Terashima, Nobuyuki Kurita, Andhika Kiswandhi +7
Thermodynamic Properties of the Kagome Lattice in Volborthite
Satoshi Yamashita, Tomoya Moriura, Yasuhiro Nakazawa +3
The second phase transition in the pyrochlore oxide Cd2Re2O7
Zenji Hiroi, Jun-Ichi Yamaura, Yuji Muraoka +1
Magnetic Phase Diagram of the Breathing Pyrochlore Antiferromagnet LiGa1-xInxCr4O8
Yoshihiko Okamoto, Gøran J. Nilsen, Taishi Nakazono +1
One-dimensionalization by Geometrical Frustration in the Anisotropic Triangular Lattice of the 5d Quantum Antiferromagnet Ca3ReO5Cl2
Daigorou Hirai, Kazuhiro Nawa, Mitsuaki Kawamura +2
Pyrochlore Oxide Superconductor Cd2Re2O7 Revisited
Zenji Hiroi, Jun-ichi Yamaura, Tatsuo C. Kobayashi +2
Frustrated Magnetism of the Maple-Leaf-Lattice Antiferromagnet MgMn$_3$O$_7$$\cdot$3H$_2$O
Yuya Haraguchi, Akira Matsuo, Koichi Kindo +1
Discontinuous Lifshitz Transition Achieved by Band-Filling Control in NaxCoO2
Yoshihiko Okamoto, Atsushi Nishio, Zenji Hiroi
Upper critical field and de Haas-van Alphen oscillations in KOs$_2$O$_6$ measured in a hybrid magnet
Taichi Terashima, Nobuyuki Kurita, Atsushi Harada +5
A Magnetic Transition Probed by the Ce Ion in Square-Lattice Antiferromagnet CeMnAsO
Yuto Tsukamoto, Yoshihiko Okamoto, Kazuyuki Matsuhira +2
Formation and Control of Twin Domains in the Pyrochlore Oxide Cd2Re2O7
Yasuhito Matsubayashi, Daigorou Hirai, Masashi Tokunaga +1
High-field Phase Diagram and Spin Structure of Volborthite Cu3V2O7(OH)2/2H2O
Makoto Yoshida, Masashi Takigawa, Steffen Kramer +6
Crystal structure of the pyrochlore oxide superconductor KOs$_2$O$_6$
Jun-Ichi Yamaura, Shigeki Yonezawa, Yuji Muraoka +1
Magnetization "Steps" on a Kagome Lattice in Volborthite
Hiroyuki Yoshida, Yoshihiko Okamoto, Takashi Tayama +8
Split Fermi Surfaces of the Spin-Orbit-Coupled Metal Cd2Re2O7 Probed by de Haas-van Alphen Effect
Yasuhito Matsubayashi, Kaori Sugii, Hishiro T. Hirose +5
Kagome-Triangular Lattice Antiferromagnet NaBa2Mn3F11
Hajime Ishikawa, Tsuyoshi Okubo, Yoshihiko Okamoto +1
Erratum to Three Papers on the beta-Pyrochlore Oxide Superconductors
Zenji Hiroi, Shigeki Yonezawa, Jun-Ichi Yamaura +3
Low Temperature Symmetry of Pyrochlore Oxide Cd2Re2O7
Jun-Ichi Yamaura, Zenji Hiroi
"Visible" 5d orbital states in a pleochroic oxychloride
Daigorou Hirai, Takeshi Yajima, Daisuke Nishio-Hamane +7
Photocarrier Injection and Current-Voltage Characteristics of a La0.8Sr0.2MnO3/SrTiO3:Nb Heterojunction at Low Temperature
Takaki Muramatsu, Yuji Muraoka, Zenji Hiroi
Facile synthetic route to transition metal oxyfluorides via reactions between metal oxides and PTFE
Daigorou Hirai, Osamu Sawai, Teppei Nunoura +1
High-pressure study on the superconducting pyrochlore oxide Cd2Re2O7
Zenji Hiroi, Touru Yamauchi, Takahiro Yamada +6
High Pressure Effects on Superconductivity in the beta-pyrochlore Oxides AOs2O6 (A=K, Rb, Cs)
Takaki Muramatsu, Shigeki Yonezawa, Yuji Muraoka +1
Magnetoelastic couplings in the deformed Kagomé quantum spin lattice of volborthite
Akihiko Ikeda, Shunsuke Furukawa, Oleg Janson +5
Anomalous Flux Pinning in ?-Pyrochlore Oxide Superconductor KOs2O6
Zenji Hiroi, Shigeki Yonezawa
Novel Rattling of K Atoms in Aluminium-Doped Defect Pyrochlore Tungstate
Elvis Shoko, Gordon J Kearley, Vanessa K Peterson +5
Superconductivity and Rattling under High Pressure in the beta-Pyrochlore Oxide RbOs2O6
Nao Takeshita, Hiroki Ogusu, Jun-ichi Yamaura +2
Neutron Scattering Study of the Localized Mode in the beta-Pyrochlore Superconductors AOs2O6
Kenzo Sasai, Kazuma Hirota, Yohei Nagao +2
Specific Heat of the beta-Pyrochlore Oxide Superconductors CsOs2O6 and RbOs2O6
Zenji Hiroi, Shigeki Yonezawa, Takaki Muramatsu +2
Novel Phase Transitions in the Breathing Pyrochlore Lattice: 7Li-NMR on LiInCr4O8 and LiGaCr4O8
Yu Tanaka, Makoto Yoshida, Masashi Takigawa +2
Superconducting and Structural Transitions in the β-Pyrochlore Oxide KOs2O6 under High Pressure
Hiroki Ogusu, Nao Takeshita, Koichi Izawa +5
Helical order and multiferroicity in the $S=1/2$ quasi-kagome system KCu$_3$As$_2$O$_7$(OD)$_3$
Gøran J. Nilsen, Yoshihiko Okamoto, Hajime Ishikawa +7
Magnetic Properties of the Spin-1/2 Deformed Kagome Antiferromagnet Edwardsite
Hajime Ishikawa, Yoshihiko Okamoto, Zenji Hiroi
YCr6Ge6 as a Candidate Compound for a Kagome Metal
Yui Ishii, Hisatomo Harima, Yoshihiko Okamoto +2
High-Field ESR Measurements of S=1/2 Kagome Lattice Antiferromagnet BaCu$_3$V$_2$O$_8$(OH)$_2$
Wei-min Zhang, Hitoshi Ohta, Susumu Okubo +5
Photocarrier injection and the I-V characteristics of La0.8Sr0.2MnO3/SrTiO3:Nb heterojunctions
Takaki Muramatsu, Yuji Muraoka, Zenji Hiroi
Chemical trends of superconducting properties in pyrochlore oxides
Zenji Hiroi, Jun-Ichi Yamaura, Shigeki Yonezawa +1
Collinear Spin-density-wave Order and Anisotropic Spin Fluctuations in the Frustrated $J_1$--$J_2$ Chain Magnet NaCuMoO$_4$(OH)
Kazuhiro Nawa, Makoto Yoshida, Masashi Takigawa +2
Unique Phase Transition on Spin-2 Triangular Lattice of Ag2MnO2
Hiroyuki Yoshida, Sascha Ahlert, Martin Jansen +3