Incommensurate Magnetic Ordering and Spin-Liquid-Like State in a Triangular Lattice BaVS<FONT SIZE="-1">3</FONT>:  Neutron Diffraction and Scattering Study

Hiroyuki Nakamura; Tomoaki Yamasaki; Saurav Giri; Hideto Imai; Masayuki Shiga; Kenji Kojima; Masakazu Nishi; Kazuhisa Kakurai; Naoto Metoki

doi:10.1143/jpsj.69.2763

Incommensurate Magnetic Ordering and Spin-Liquid-Like State
in a Triangular Lattice BaVS₃:
Neutron Diffraction and Scattering Study

Hiroyuki Nakamura, Tomoaki Yamasaki, Saurav Giri, Hideto Imai, Masayuki Shiga, Kenji Kojima, Masakazu Nishi, Kazuhisa Kakurai, Naoto Metoki

Author information

Hiroyuki Nakamura
Department of Materials Science and Engineering, Kyoto University, Kyoto 606–8501
Tomoaki Yamasaki
Department of Materials Science and Engineering, Kyoto University, Kyoto 606–8501
Saurav Giri
Department of Materials Science and Engineering, Kyoto University, Kyoto 606–8501
Hideto Imai
Department of Materials Science and Engineering, Kyoto University, Kyoto 606–8501
Masayuki Shiga
Department of Materials Science and Engineering, Kyoto University, Kyoto 606–8501
Kenji Kojima
Department of Superconductivity, The University of Tokyo, Tokyo 113–8656
Masakazu Nishi
Neutron Scattering Laboratory, Institute for Solid State Physics, The University of Tokyo, Tokai, Ibaraki 319–1106
Kazuhisa Kakurai
Neutron Scattering Laboratory, Institute for Solid State Physics, The University of Tokyo, Tokai, Ibaraki 319–1106
Naoto Metoki
Advanced Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319–1195

Keywords: BaVS₃, neutron diffraction, neutron scattering, incommensurate magnetic ordering, spin liquid

JOURNAL RESTRICTED ACCESS

2000 Volume 69 Issue 9 Pages 2763-2766

DOI https://doi.org/10.1143/jpsj.69.2763

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Abstract

We performed powder neutron diffraction and scattering experiments of the S = \frac{1}{2}$ triangular lattice system, BaVS₃, and found magnetic reflections below T_X \simeq 30$ K. The propagation vector is determined to be incommensurate (0.226 0.226 0) in the hexagonal index. The ordered moment is roughly estimated to be ∼ 0.5μ _B/V. Although the elastic magnetic diffractions disappear above T_X, low-energy inelastic scattering, which has an Q-ω dispersion similar to that below T_X, was observed between T_X and the metal-insulator transition point T_MI \simeq 70$ K, indicating the presence of a long-range and dynamic antiferromagnetic correlation, i.e., a spin-liquid-like state, between T_X and T_MI.

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