Investigation of structural changes in chiral magnet Cr1/3NbS2 under application of pressure

M. Mito, T. Tajiri, K. Tsuruta, H. Deguchi, J. Kishine, K. Inoue, Y. Kousaka, Y. Nakao, J. Akimitsu

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Abstract

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.

Original languageEnglish
Article number183904
JournalJournal of Applied Physics
Volume117
Issue number18
DOIs
Publication statusPublished - May 14 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Mito, M., Tajiri, T., Tsuruta, K., Deguchi, H., Kishine, J., Inoue, K., Kousaka, Y., Nakao, Y., & Akimitsu, J. (2015). Investigation of structural changes in chiral magnet Cr1/3NbS2 under application of pressure. Journal of Applied Physics, 117(18), [183904]. https://doi.org/10.1063/1.4919833