TY - JOUR
T1 - Short-range spin order in paramagnetic AgCrSe2
AU - Nakamura, Jumpei G.
AU - Kawakita, Yukinobu
AU - Okabe, Hirotaka
AU - Li, Bing
AU - Shimomura, Koichiro
AU - Suemasu, Takashi
N1 - Funding Information:
We are grateful to Professor Yuzo Ohno, Professor Hideto Yanagihara, Professor Muneaki Hase (Univ. of Tsukuba) and Professor Wataru Higemoto (ASRC, JAEA), for their useful advices and discussions. The experiments at the MLF of the J-PARC were performed under a user program (Proposal No. 2020B0278). We would like to thank the staff of the J-PARC, in particular, Dr. Takashi U. Ito (ASRC), Dr. Izumi Umegaki, Dr. Masatoshi Hiraishi, Dr. Shoichiro Nishimura, Dr. Sotaro Kanda, Dr. Akihiro Koda and Professor Ryosuke Kadono (IMSS, KEK) for their technical support and helpful discussions. We would like to thank Mr. Hua Li (IMSS) in the first-principles calculations, Dr. Takashi Honda and Mr. Kaoru Namba (IMSS) in the powder XRD measurements, Dr. Motoyuki Ishikado (CROSS) in the MPMS measurements at the CROSS user laboratories, for their support and advice. We are also grateful to Professor Nobuhiro Kosugi (Director, IMSS) for continuous encouragement.
Publisher Copyright:
© 2022 The Author(s)
PY - 2023/4
Y1 - 2023/4
N2 - Muon spin rotation (μSR) experiments were performed to directly investigate the temperature dependence of the short-range order or correlations of chromium spins in the paramagnetic phase of AgCrSe2. The detailed investigation of the μSR spectra over a wide temperature range from low to high temperatures revealed that the short-range spin correlations developed below about 184 K. It also confirmed no short-range correlation at high temperatures, which had been controversial in previous quasi-elastic neutron scattering studies. In addition, the muon spin relaxation was qualitatively changed and showed large missing asymmetry below about 89 K, where the correlation clearly implied short-range spin order. There could be a preparative phenomenon of the phase transition or an anisotropic short-range spin correlation.
AB - Muon spin rotation (μSR) experiments were performed to directly investigate the temperature dependence of the short-range order or correlations of chromium spins in the paramagnetic phase of AgCrSe2. The detailed investigation of the μSR spectra over a wide temperature range from low to high temperatures revealed that the short-range spin correlations developed below about 184 K. It also confirmed no short-range correlation at high temperatures, which had been controversial in previous quasi-elastic neutron scattering studies. In addition, the muon spin relaxation was qualitatively changed and showed large missing asymmetry below about 89 K, where the correlation clearly implied short-range spin order. There could be a preparative phenomenon of the phase transition or an anisotropic short-range spin correlation.
KW - Magnetic materials
KW - Muon spin rotation (μSR)
KW - Short-range spin order
KW - Thermoelectric materials
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U2 - 10.1016/j.jpcs.2022.111199
DO - 10.1016/j.jpcs.2022.111199
M3 - Article
AN - SCOPUS:85145214936
SN - 0022-3697
VL - 175
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
M1 - 111199
ER -