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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2405.07405 |
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| _version_ | 1866913691803320320 |
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| author | Nukui, Koki Iihama, Satoshi Ishibashi, Kazuaki Yamashita, Shogo Sakuma, Akimasa Scheid, Philippe Malinowski, Grégory Hehn, Michel Mangin, Stéphane Mizukami, Shigemi |
| author_facet | Nukui, Koki Iihama, Satoshi Ishibashi, Kazuaki Yamashita, Shogo Sakuma, Akimasa Scheid, Philippe Malinowski, Grégory Hehn, Michel Mangin, Stéphane Mizukami, Shigemi |
| contents | We investigated photon-helicity-induced magnetization precession in Co$_{1-x}$Pt$_{x}$ alloy thin films. In addition to field-like torque, attributable to magnetic field generation owing to {\it the inverse Faraday effect}, we observed non-trivial and large damping-like torque which has never been discussed for single ferromagnetic layer. The composition dependence of those two torques is effectively elucidated by a model that considers mutual coupling via spin-orbit interaction between magnetization and the electronic orbital angular momentum generated by photon-helicity. This work significantly enhances our understanding of the physics relevant to the interplay of photon-helicity and magnetization in magnetic metals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_07405 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Light-induced torque in ferromagnetic metals via orbital angular momentum generated by photon-helicity Nukui, Koki Iihama, Satoshi Ishibashi, Kazuaki Yamashita, Shogo Sakuma, Akimasa Scheid, Philippe Malinowski, Grégory Hehn, Michel Mangin, Stéphane Mizukami, Shigemi Materials Science We investigated photon-helicity-induced magnetization precession in Co$_{1-x}$Pt$_{x}$ alloy thin films. In addition to field-like torque, attributable to magnetic field generation owing to {\it the inverse Faraday effect}, we observed non-trivial and large damping-like torque which has never been discussed for single ferromagnetic layer. The composition dependence of those two torques is effectively elucidated by a model that considers mutual coupling via spin-orbit interaction between magnetization and the electronic orbital angular momentum generated by photon-helicity. This work significantly enhances our understanding of the physics relevant to the interplay of photon-helicity and magnetization in magnetic metals. |
| title | Light-induced torque in ferromagnetic metals via orbital angular momentum generated by photon-helicity |
| topic | Materials Science |
| url | https://arxiv.org/abs/2405.07405 |