Predicted Multiple Walker Breakdowns for Current-Driven Domain-Wall Motion in Antiferromagnets
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866910418000150528 |
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| author | Lee, Mu-Kun Otxoa, Rubén M. Mochizuki, Masahito |
| author_facet | Lee, Mu-Kun Otxoa, Rubén M. Mochizuki, Masahito |
| contents | We theoretically discover possible emergence of reentrant Walker breakdowns for current-driven domain walls in layered antiferromagnets in striking contrast to the unique Walker breakdown in ferromagnets. We reveal that the Lorentz contraction of domain-wall width in antiferromagnets gives rise to nonlinear current-dependence of the wall velocity and the predicted multiple Walker breakdowns. The dominant efficiency of the current-induced staggered spin-orbit torque over the spin-transfer torque to drive the domain-wall motion is also demonstrated. These findings are expected to be observed in synthetic antiferromagnets experimentally and provide an important contribution to the growing research field of antiferromagnetic spintronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_10337 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Predicted Multiple Walker Breakdowns for Current-Driven Domain-Wall Motion in Antiferromagnets Lee, Mu-Kun Otxoa, Rubén M. Mochizuki, Masahito Mesoscale and Nanoscale Physics We theoretically discover possible emergence of reentrant Walker breakdowns for current-driven domain walls in layered antiferromagnets in striking contrast to the unique Walker breakdown in ferromagnets. We reveal that the Lorentz contraction of domain-wall width in antiferromagnets gives rise to nonlinear current-dependence of the wall velocity and the predicted multiple Walker breakdowns. The dominant efficiency of the current-induced staggered spin-orbit torque over the spin-transfer torque to drive the domain-wall motion is also demonstrated. These findings are expected to be observed in synthetic antiferromagnets experimentally and provide an important contribution to the growing research field of antiferromagnetic spintronics. |
| title | Predicted Multiple Walker Breakdowns for Current-Driven Domain-Wall Motion in Antiferromagnets |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2312.10337 |