Crystal-field magnetostriction of the spin ice under ultrahigh magnetic fields
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arXiv
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| Autores principales: | , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866915098118848512 |
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| author | Tang, Nan Gen, Masaki Rotter, Martin Man, Huiyuan Matsuhira, Kazuyuki Matsuo, Akira Kindo, Koichi Ikeda, Akihiko Matsuda, Yasuhiro H. Gegenwart, Philipp Nakatsuji, Satoru Kohama, Yoshimitsu |
| author_facet | Tang, Nan Gen, Masaki Rotter, Martin Man, Huiyuan Matsuhira, Kazuyuki Matsuo, Akira Kindo, Koichi Ikeda, Akihiko Matsuda, Yasuhiro H. Gegenwart, Philipp Nakatsuji, Satoru Kohama, Yoshimitsu |
| contents | We present a comprehensive study of the magnetoelastic properties of the Ising pyrochlore oxide Ho$_{2}$Ti$_{2}$O$_{7}$, known as spin ice, by means of high-field magnetostriction measurements and numerical calculations. When a magnetic field is applied along the crystallographic <111> axis, the longitudinal magnetostriction exhibits a broad maximum in the low-field regime around 30 T, followed by a dramatic lattice contraction due to crystal-field (CF) level crossing at $B_{\rm cf} \sim 65$ T. The transverse magnetostriction exhibits a contrasting behavior, highlighting the anisotropic nature of the CF striction. We identify distinct timescales of spin dynamics and CF-phonon dynamics by applying a magnetic field with different field-sweep rates. Our mean-field calculations, based on a point-charge model, successfully reproduce the overall magnetostriction behavior, revealing the competition between the exchange striction and CF striction. A signature of the CF level crossing is also observed through adiabatic magnetocaloric-effect measurements, consistent with our magnetostriction data. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_03673 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Crystal-field magnetostriction of the spin ice under ultrahigh magnetic fields Tang, Nan Gen, Masaki Rotter, Martin Man, Huiyuan Matsuhira, Kazuyuki Matsuo, Akira Kindo, Koichi Ikeda, Akihiko Matsuda, Yasuhiro H. Gegenwart, Philipp Nakatsuji, Satoru Kohama, Yoshimitsu Strongly Correlated Electrons We present a comprehensive study of the magnetoelastic properties of the Ising pyrochlore oxide Ho$_{2}$Ti$_{2}$O$_{7}$, known as spin ice, by means of high-field magnetostriction measurements and numerical calculations. When a magnetic field is applied along the crystallographic <111> axis, the longitudinal magnetostriction exhibits a broad maximum in the low-field regime around 30 T, followed by a dramatic lattice contraction due to crystal-field (CF) level crossing at $B_{\rm cf} \sim 65$ T. The transverse magnetostriction exhibits a contrasting behavior, highlighting the anisotropic nature of the CF striction. We identify distinct timescales of spin dynamics and CF-phonon dynamics by applying a magnetic field with different field-sweep rates. Our mean-field calculations, based on a point-charge model, successfully reproduce the overall magnetostriction behavior, revealing the competition between the exchange striction and CF striction. A signature of the CF level crossing is also observed through adiabatic magnetocaloric-effect measurements, consistent with our magnetostriction data. |
| title | Crystal-field magnetostriction of the spin ice under ultrahigh magnetic fields |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.03673 |