Weak Ferromagnetism in Altermagnets from Alternating $g$-Tensor Anisotropy
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866909541719867392 |
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| author | Jo, Daegeun Go, Dongwook Mokrousov, Yuriy Oppeneer, Peter M. Cheong, Sang-Wook Lee, Hyun-Woo |
| author_facet | Jo, Daegeun Go, Dongwook Mokrousov, Yuriy Oppeneer, Peter M. Cheong, Sang-Wook Lee, Hyun-Woo |
| contents | Altermagnets are magnetic materials with antiferromagnetic spin ordering but exhibit ferromagnetic properties. Understanding the microscopic origin of the latter is a central problem. Ferromagnet-like properties such as the anomalous Hall effect are linked with weak ferromagnetism, whose microscopic origin in altermagnets remains unclear however. We show theoretically that the alternating $g$-tensor anisotropy in altermagnets can induce weak ferromagnetism even when the Dzyaloshinskii-Moriya interaction is forbidden. We demonstrate this mechanism to explain weak ferromagnetism for both collinear and noncollinear spin altermagnets. Our findings provide new insights into the origin of weak ferromagnetism and suggest orbital-based ways for manipulating magnetic configurations in altermagnets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_17386 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Weak Ferromagnetism in Altermagnets from Alternating $g$-Tensor Anisotropy Jo, Daegeun Go, Dongwook Mokrousov, Yuriy Oppeneer, Peter M. Cheong, Sang-Wook Lee, Hyun-Woo Materials Science Altermagnets are magnetic materials with antiferromagnetic spin ordering but exhibit ferromagnetic properties. Understanding the microscopic origin of the latter is a central problem. Ferromagnet-like properties such as the anomalous Hall effect are linked with weak ferromagnetism, whose microscopic origin in altermagnets remains unclear however. We show theoretically that the alternating $g$-tensor anisotropy in altermagnets can induce weak ferromagnetism even when the Dzyaloshinskii-Moriya interaction is forbidden. We demonstrate this mechanism to explain weak ferromagnetism for both collinear and noncollinear spin altermagnets. Our findings provide new insights into the origin of weak ferromagnetism and suggest orbital-based ways for manipulating magnetic configurations in altermagnets. |
| title | Weak Ferromagnetism in Altermagnets from Alternating $g$-Tensor Anisotropy |
| topic | Materials Science |
| url | https://arxiv.org/abs/2410.17386 |