Magnetoelastic coupling at the field-induced transition in EuAl$_{12}$O$_{19}$
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866908859878080512 |
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| author | Haidamak, T. Bastien, G. Proschek, P. Eliáš, A. Colman, R. H. Gorbunov, D. Zherlitsyn, S. Zvyagin, A. A. Zvyagina, G. A. Prokleška, J. Sechovský, V. Vališka, M. |
| author_facet | Haidamak, T. Bastien, G. Proschek, P. Eliáš, A. Colman, R. H. Gorbunov, D. Zherlitsyn, S. Zvyagin, A. A. Zvyagina, G. A. Prokleška, J. Sechovský, V. Vališka, M. |
| contents | Magnetoelastic coupling plays a crucial role in magnetic-field-induced transitions in anisotropic ferromagnets. Ultrasonic methods are suitable for experimental investigations of these phenomena. We investigate elastic constants in EuAl$_{12}$O$_{19}$, a quasi-two-dimensional anisotropic ferromagnet, by measuring sound velocity in magnetic fields perpendicular to spontaneous magnetization. The shear modulus $C_{44}$ exhibits dramatic softening at the field-induced transition from the ferromagnetic to a paramagnetic phase with magnetic moments forced to polarize along the applied transverse field. The softening is attributed to strong magnetic fluctuations near a second-order phase transition. Theoretical calculations based on magnetization data qualitatively reproduced the observed behavior within a strain-exchange mechanism. These results demonstrate that magnetoelastic coupling in EuAl$_{12}$O$_{19}$ arises primarily from exchange striction and provide a framework for modeling similar transitions in other anisotropic ferromagnets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_15833 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Magnetoelastic coupling at the field-induced transition in EuAl$_{12}$O$_{19}$ Haidamak, T. Bastien, G. Proschek, P. Eliáš, A. Colman, R. H. Gorbunov, D. Zherlitsyn, S. Zvyagin, A. A. Zvyagina, G. A. Prokleška, J. Sechovský, V. Vališka, M. Strongly Correlated Electrons Magnetoelastic coupling plays a crucial role in magnetic-field-induced transitions in anisotropic ferromagnets. Ultrasonic methods are suitable for experimental investigations of these phenomena. We investigate elastic constants in EuAl$_{12}$O$_{19}$, a quasi-two-dimensional anisotropic ferromagnet, by measuring sound velocity in magnetic fields perpendicular to spontaneous magnetization. The shear modulus $C_{44}$ exhibits dramatic softening at the field-induced transition from the ferromagnetic to a paramagnetic phase with magnetic moments forced to polarize along the applied transverse field. The softening is attributed to strong magnetic fluctuations near a second-order phase transition. Theoretical calculations based on magnetization data qualitatively reproduced the observed behavior within a strain-exchange mechanism. These results demonstrate that magnetoelastic coupling in EuAl$_{12}$O$_{19}$ arises primarily from exchange striction and provide a framework for modeling similar transitions in other anisotropic ferromagnets. |
| title | Magnetoelastic coupling at the field-induced transition in EuAl$_{12}$O$_{19}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.15833 |