Optomagnetic non-thermal modification of the ferromagnetic resonance
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866916012429934592 |
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| author | Gribova, Nika Zvezdin, Anatoly Cao, Shixun Belotelov, Vladimir |
| author_facet | Gribova, Nika Zvezdin, Anatoly Cao, Shixun Belotelov, Vladimir |
| contents | We investigate the photoinduced shift of the ferromagnetic resonance (FMR) frequency in magnets caused by the inverse Cotton-Mouton effect (ICME) under linearly polarized light. Using a Lagrangian description of magnetization dynamics, we derive the equations of motion, and obtain analytical expressions for the resonance frequency in both in-plane and out-of-plane equilibrium configurations. The theory shows that the FMR frequency depends on the polarization angle and propagation direction of light, with ICME producing a frequency shift that can dominate over thermal effects. The analytical results agree well with numerical simulations and with available experimental data for bismuth-substituted yttrium iron garnet, enabling estimation of the ICME contribution. These findings demonstrate that linearly polarized light can be used to control ferromagnetic resonance through magneto-optical effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_07555 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Optomagnetic non-thermal modification of the ferromagnetic resonance Gribova, Nika Zvezdin, Anatoly Cao, Shixun Belotelov, Vladimir Materials Science We investigate the photoinduced shift of the ferromagnetic resonance (FMR) frequency in magnets caused by the inverse Cotton-Mouton effect (ICME) under linearly polarized light. Using a Lagrangian description of magnetization dynamics, we derive the equations of motion, and obtain analytical expressions for the resonance frequency in both in-plane and out-of-plane equilibrium configurations. The theory shows that the FMR frequency depends on the polarization angle and propagation direction of light, with ICME producing a frequency shift that can dominate over thermal effects. The analytical results agree well with numerical simulations and with available experimental data for bismuth-substituted yttrium iron garnet, enabling estimation of the ICME contribution. These findings demonstrate that linearly polarized light can be used to control ferromagnetic resonance through magneto-optical effects. |
| title | Optomagnetic non-thermal modification of the ferromagnetic resonance |
| topic | Materials Science |
| url | https://arxiv.org/abs/2604.07555 |