91 citations · 524 across the 25 of their papers we have counts for
25 papers
Unveiling exotic magnetic phase diagram of a non-Heisenberg quasicrystal approximant
Farid Labib, Kazuhiro Nawa, Shintaro Suzuki +7
A magnetic phase diagram of the non-Heisenberg Tsai-type 1/1 Au-Ga-Tb approximant crystal (AC) has been established across a wide electron-per-atom (e/a) range via magnetization an…
Atomic structure and magnetism of the Au-Ga-Ce 1/1 approximant crystal
Shintaro Suzuki, Azusa Motouri, Kazuhiko Deguchi +6
We report a new Au-Ga-Ce 1/1 approximant crystal (AC) which possesses a significantly wide single-phase region of 53 - 70 at% Au and 13.6 - 15.1 at% Ce. Single crystal X-ray struct…
Magnetic structure and Kondo lattice behavior in CeVGe: an NMR and neutron scattering study
C. Chaffey, H. C. Wu, Hanshang Jin +9
We present nuclear magnetic resonance (NMR), neutron diffraction, magnetization, and transport measurements on a single crystal and powder of CeVGe. This material exhibits heav…
Unraveling the magnetic structure of YbNiSn single crystal via crystal growth and neutron diffraction
Hung-Cheng Wu, Ai Nakamura, Daisuke Okuyama +3
Neutron and x-ray diffraction experiments were performed on the ternary intermetallic compound YbNiSn, formerly categorized as a ferromagnetic Kondo compound. At zero field, an inc…
Magnetic structure and spin dynamics of the quasi-2D antiferromagnet Zn-doped copper pyrovanadate
G. Gitgeatpong, Y. Zhao, J. A. Fernandez-Baca +6
Magnetic properties of the antiferromagnet ZnCuVO (ZnCVO) have been thoroughly investigated on powder and single-crystal samples. The crystal structure de…
Structural and magnetic properties of the quasicrystal approximant AuGaTb
Kazuhiro Nawa, Maxim Avdeev, Asuka Ishikawa +6
Magnetic properties of the quasicrystal approximant AuGaTb were investigated by the magnetization and the neutron diffraction experiments. The temperature depe…
Strongly electron-correlated semimetal RuI with a layered honeycomb structure
Kazuhiro Nawa, Yoshinori Imai, Youhei Yamaji +13
A polymorph of RuI synthesized under high pressure was found to have a two-layered honeycomb structure. The resistivity of RuI exhibits a semimetallic behavior, in contrast…
Magnetism of Kitaev spin-liquid candidate material RuBr
Yoshinori Imai, Kazuhiro Nawa, Yasuhiro Shimizu +16
The ruthenium halide -RuCl is a promising candidate for a Kitaev spin liquid. However, the microscopic model describing -RuCl is still debated partly because of a…
Antiferromagnetic order of ferromagnetically coupled dimers in the double pyrovanadate CaCoVO
Ryo Murasaki, Kazuhiro Nawa, Daisuke Okuyama +2
Magnetic properties of the pyrovanadate CaCoVO have been studied by means of the bulk magnetization and neutron powder diffraction measurements. Magnetic susceptibility in…
Anisotropic Triangular Lattice Realized in Rhenium Oxychlorides A3ReO5Cl2 (A = Ba and Sr)
Daigorou Hirai, Takeshi Yajima, Kazuhiro Nawa +2
We report the synthesis, crystal structure, and magnetic properties of two new quantum antiferromagnets A3ReO5Cl2 (A = Sr and Ba). The crystal structure is isostructural with the m…
Effect of Ge-substitution on Magnetic Properties in the Itinerant Chiral Magnet MnSi
Seno Aji, Hidesato Ishida, Daisuke Okuyama +3
We have investigated the effect of Ge-substitution to the magnetic ordering in the B20 itinerant chiral magnet MnSi prepared by melting and annealing under ambient pressure. From m…
One-dimensionalization by Geometrical Frustration in the Anisotropic Triangular Lattice of the 5d Quantum Antiferromagnet Ca3ReO5Cl2
Daigorou Hirai, Kazuhiro Nawa, Mitsuaki Kawamura +2
We report on the emergence of antiferromagnetic spin chains from two-dimensionally aligned spins on the anisotropic triangular lattice (ATL) in the insulating calcium rhenium oxych…
Triplon band splitting and topologically protected edge states in the dimerized antiferromagnet
Kazuhiro Nawa, Kimihiko Tanaka, Nobuyuki Kurita +6
The search for topological insulators has been actively promoted in the field of condensed matter physics for further development in energy-efficient information transmission and p…
Degenerate ground state in the classical pyrochlore antiferromagnet NaMn(CO)Cl
Kazuhiro Nawa, Daisuke Okuyama, Maxim Avdeev +5
In an ideal classical pyrochlore antiferromagnet without perturbations, an infinite degeneracy at a ground state leads to absence of a magnetic order and spin-glass transition. Her…
Collinear Spin-density-wave Order and Anisotropic Spin Fluctuations in the Frustrated -- Chain Magnet NaCuMoO(OH)
Kazuhiro Nawa, Makoto Yoshida, Masashi Takigawa +2
The phase diagram of the quasi-one-dimensional magnet NaCuMoO(OH) is established through single-crystal NMR and heat-capacity measurements. The Na and H NMR experime…
Anisotropic Field-Induced Gap in Quasi-One-Dimensional Antiferromagnet KCuMoO(OH)
Kazuhiro Nawa, Oleg Janson, Zenji Hiroi
We investigated magnetic and thermodynamic properties of = 1/2 quasi-one-dimensional antiferromagnet KCuMoO(OH) through single crystalline magnetization and heat capacity m…
Dynamics of Bound Magnon Pairs in the Quasi-One-Dimensional Frustrated Magnet LiCuVO_4
Kazuhiro Nawa, Masashi Takigawa, Steffen Krämer +4
We report on the dynamics of the spin-1/2 quasi-one-dimensional frustrated magnet LiCuVO measured by nuclear spin relaxation in high magnetic fields 10--34 T, in which…
Spin dynamics in the high-field phases of volborthite
M. Yoshida, K. Nawa, H. Ishikawa +13
We report single-crystal 51V NMR studies on volborthite Cu3V2O7(OH)2 2H2O, which is regarded as a quasi-two-dimensional frustrated magnet with competing ferromagnetic and antiferro…
Structural anomalies and short-range magnetic correlations in the orbitally degenerated system SrVO
Ichihiro Yamauchi, Kazuhiro Nawa, Masatoshi Hiraishi +10
We report on the electronic ground state of a layered perovskite vanadium oxide SrVO studied by the combined use of synchrotron radiation x-ray diffraction (SR-XRD) and muo…
One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite
H. Ishikawa, M. Yoshida, K. Nawa +12
We have synthesized high-quality single crystals of volborthite, a seemingly distorted kagome antiferromagnet, and carried out high-field magnetization measurements up to 74 T and…
Orbital Arrangements and Magnetic Interactions in the Quasi-One-Dimensional Cuprates ACuMoO_4(OH) (A = Na, K)
Kazuhiro Nawa, Takeshi Yajima, Yoshihiko Okamoto +1
A new spin-1/2 quasi-one-dimensional antiferromagnet KCuMoO_4(OH) is prepared by the hydrothermal method. The crystal structures of KCuMoO_4(OH) and the already-known Na-analogue,…
Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnet LiCuVO
N. Büttgen, K. Nawa, T. Fujita +7
We have performed NMR experiments on the quasi one-dimensional frustrated spin-1/2 system LiCuVO in magnetic fields applied along the c-axis up to field values near the sat…
NaCuMoO_4(OH) as a Candidate Frustrated J_1-J_2 Chain Quantum Magnet
Kazuhiro Nawa, Yoshihiko Okamoto, Akira Matsuo +9
In a frustrated J_1-J_2 chain with the nearest-neighbor ferromagnetic interaction J_1 and the next-nearest-neighbor antiferromagnetic interaction J_2, novel magnetic states such as…
Anisotropic spin fluctuations in the quasi one-dimensional frustrated magnet LiCuVO_4
Kazuhiro Nawa, Masashi Takigawa, Makoto Yoshida +1
We report results of NMR experiments on a single crystal of the quasi one-dimensional frustrated magnet LiCuVO_4. The NMR spectra of ^7Li and ^{51}V nuclei indicate a helical spin…