Investigation of structural changes in chiral magnet Cr{sub 1∕3}NbS{sub 2} under application of pressure

Journal Article · Thu May 14 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4919833· OSTI ID:22410176

Tsuruta, K.; Deguchi, H. ^[1]; Tajiri, T. ^[2]; Kishine, J. ^[3]; Inoue, K. ^[4]; Kousaka, Y. ^[4]; Nakao, Y. ^[5]; Akimitsu, J. ^[4]

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1. Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550 (Japan)
2. Faculty of Science, Fukuoka University, Fukuoka 814-0180 (Japan)
3. Graduate School of Arts and Sciences, The Open University of Japan, Chiba 261-8586 (Japan)
4. Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526 (Japan)
5. Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara 229-8558 (Japan)

We perform structural analysis experiments on the chiral magnet Cr{sub 1∕3}NbS{sub 2}, in which Cr{sup 3+} ions are inserted between hexagonal NbS{sub 2} layers. The noncentrosymmetrical nature of the inserted Cr{sup 3+} appears as a distorted CrS{sub 6} 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 CrS{sub 6} 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 T{sub C} decreases, and dT{sub C}/dP exhibits a slight change at around 3 GPa. A series of experiments indicates that the change in the structural symmetry of the CrS{sub 6} octahedron influences the exchange network between Cr{sup 3+} ions as well as the D-M interaction.

• OSTI ID: 22410176
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APPROXIMATIONS
CHIRALITY
CHROMIUM COMPOUNDS
CHROMIUM IONS
CRYSTAL STRUCTURE
LATTICE PARAMETERS
LAYERS
MAGNETIZATION
MAGNETS
NIOBIUM SULFIDES
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
SYMMETRY