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Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
Faculty of Science, Fukuoka University, Fukuoka 814-0180, Japan
Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
Graduate School of Arts and Sciences, The Open University of Japan, Chiba 261-8586, Japan
Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan, Institute for Advanced Materials Research, Hiroshima University, Higashihiroshima 739-8526, Japan, Center for Chiral Science, Hiroshima University, Higashihiroshima 739-8526, Japan
Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan, Center for Chiral Science, Hiroshima University, Higashihiroshima 739-8526, Japan
Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara 229-8558, Japan
Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan, Center for Chiral Science, Hiroshima University, Higashihiroshima 739-8526, Japan, Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara 229-8558, Japan
抄録
We perform structural analysis experiments on the chiral magnet Cr1∕3NbS2, in which Cr3+ ions are inserted between hexagonal NbS2 layers. The noncentrosymmetrical nature of the inserted Cr3+ appears as a distorted CrS6 octahedron. Under the application of hydrostatic pressure, the lattice shrinks significantly along the c-axis rather than the a-axis. However, at a pressure P of approximately 3–4 GPa, a kink in the rate of decrease in the lattice parameters is observed, and the slight movement of a Nb atom along the c-axis brings about a decrease in the distortion of the CrS6 octahedron. This structural change qualitatively suggests a decrease in the strength of the Dzyaloshinskii-Moriya (D-M) interaction. Under hydrostatic pressure, the magnetic ordering temperature TC decreases, and dTC/dP exhibits a slight change at around 3 GPa. A series of experiments indicates that the change in the structural symmetry of the CrS6 octahedron influences the exchange network between Cr3+ ions as well as the D-M interaction.
雑誌名
Journal of Applied Physics
巻
117
号
18
ページ
183904-1 - 183904-6
発行年
2015-05-12
出版者
AIP Publishing
ISSN
0021-8979
1089-7550
書誌レコードID
AA00693547
DOI
https://doi.org/10.1063/1.4919833
権利
Copyright (c) 2015 AIP Publishing LLC.
The following article has been submitted to/accepted by Journal of Applied Physics. After it is published, it will be found at https://aip.scitation.org/journal/jap.
Investigation of structural changes in chiral magnet Cr1∕3NbS2 under application of pressure
scunit-2018_23.pdf
(2.83MB)
