High-field magnetoacoustics of a Dy2Fe14Si3 single crystal

Andreev V, A.; Gorbunov I, D.; Nomura, T.; Zvyagin, A. A.; Zvyagina, G. A.; Zherlitsyn, S.

doi:10.1016/j.jallcom.2020.155335

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High-field magnetoacoustics of a Dy₂Fe₁₄Si₃ single crystal

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Zvyagin, A. A.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Andreev V, A., Gorbunov I, D., Nomura, T., Zvyagin, A. A., Zvyagina, G. A., & Zherlitsyn, S. (2020). High-field magnetoacoustics of a Dy₂Fe₁₄Si₃ single crystal. Journal of Alloys and Compounds, 835: 155335. doi:10.1016/j.jallcom.2020.155335.

Cite as: https://hdl.handle.net/21.11116/0000-0009-91F4-F

Abstract

Dy2Fe14Si3 (hexagonal crystal structure of the Th2Ni17 type) is a highly-anisotropic ferrimagnet with spontaneous magnetic moment M-s = 8 mu(B) per formula unit (at 2 K), directed along the Fe sublattice, and Curie temperature T-c = 500 K. The magnetic anisotropy is of the easy-plane type with the [100] axis as an easy magnetization direction. Large anisotropy is observed also within the basal plane. In fields applied along the [100] and [120] axes, field-induced phase transitions were observed at 33 T (of the first order) and at 41 T (of the second order), respectively (at 2 K). Relative changes of sound velocity and changes of sound attenuation at these phase transitions in a Dy2Fe14Si3 single crystal were measured in pulsed magnetic fields up to 58 Tat 2 K and elevated temperatures. The performed theoretical analysis suggests that the interaction of the elastic subsystem with the magnetic one is of the exchange-striction nature. (C) 2020 Elsevier B.V. All rights reserved.