XRD study of the magnetization plateau above 40 T in the frustrated helimagnet CuGaCr$_{4}$S$_{8}$
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908320277725184 |
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| author | Gen, M. Noda, K. Shimbori, K. Tanaka, T. Bhoi, D. Seki, K. Kobayashi, H. Gautam, K. Akaki, M. Ishii, Y. Matsuda, Y. H. Kubota, Y. Inubushi, Y. Yabashi, M. Kohama, Y. Arima, T. Ikeda, A. |
| author_facet | Gen, M. Noda, K. Shimbori, K. Tanaka, T. Bhoi, D. Seki, K. Kobayashi, H. Gautam, K. Akaki, M. Ishii, Y. Matsuda, Y. H. Kubota, Y. Inubushi, Y. Yabashi, M. Kohama, Y. Arima, T. Ikeda, A. |
| contents | CuGaCr$_{4}$S$_{8}$, which contains a chromium breathing pyrochlore network, exhibits diverse magnetic phases, including an incommensurate helical state below 31 K and a 1/2-magnetization plateau above 40 T, owing to the interplay between magnetic frustration and spin-lattice coupling. Here, we perform a single-shot powder x-ray diffraction experiment on CuGaCr$_{4}$S$_{8}$ in a pulsed high magnetic field of 55 T, revealing an orthorhombic-to-cubic (or pseudocubic) structural transition upon entering the 1/2-magnetization plateau phase at low temperatures. This observation suggests the emergence of a commensurate ferrimagnetic order, where a 3-up-1-down spin configuration is realized in each small tetrahedron, and the all-up or all-down in each large tetrahedron. We propose two types of 16-sublattice magnetic structures, which are degenerate within exchange interactions between the first, second, and third nearest neighbors. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_10840 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | XRD study of the magnetization plateau above 40 T in the frustrated helimagnet CuGaCr$_{4}$S$_{8}$ Gen, M. Noda, K. Shimbori, K. Tanaka, T. Bhoi, D. Seki, K. Kobayashi, H. Gautam, K. Akaki, M. Ishii, Y. Matsuda, Y. H. Kubota, Y. Inubushi, Y. Yabashi, M. Kohama, Y. Arima, T. Ikeda, A. Materials Science Strongly Correlated Electrons CuGaCr$_{4}$S$_{8}$, which contains a chromium breathing pyrochlore network, exhibits diverse magnetic phases, including an incommensurate helical state below 31 K and a 1/2-magnetization plateau above 40 T, owing to the interplay between magnetic frustration and spin-lattice coupling. Here, we perform a single-shot powder x-ray diffraction experiment on CuGaCr$_{4}$S$_{8}$ in a pulsed high magnetic field of 55 T, revealing an orthorhombic-to-cubic (or pseudocubic) structural transition upon entering the 1/2-magnetization plateau phase at low temperatures. This observation suggests the emergence of a commensurate ferrimagnetic order, where a 3-up-1-down spin configuration is realized in each small tetrahedron, and the all-up or all-down in each large tetrahedron. We propose two types of 16-sublattice magnetic structures, which are degenerate within exchange interactions between the first, second, and third nearest neighbors. |
| title | XRD study of the magnetization plateau above 40 T in the frustrated helimagnet CuGaCr$_{4}$S$_{8}$ |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2504.10840 |