Harnessing magnetic anisotropy for nonlinear magnetization precession and spin waves
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866914608243015680 |
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| author | Gerevenkov, P. I. Shelukhin, L. A. Filatov, Ia. A. Dvortsova, P. A. Kalashnikova, A. M. |
| author_facet | Gerevenkov, P. I. Shelukhin, L. A. Filatov, Ia. A. Dvortsova, P. A. Kalashnikova, A. M. |
| contents | The nonlinearity of magnetization precession and spin waves is a cornerstone of contemporary magnonics. We investigate nonlinear magnetization dynamics in a thin epitaxial iron film driven by femtosecond laser pulses in regimes of homogeneous precession and propagating magnetostatic spin wave packets. The magnetization precession anharmonicity, the generation of higher-order harmonics, and the dynamical rectification are experimentally demonstrated. The numerical solution of the non-linearized Landau-Lifshitz-Gilbert equation reveals that these effects stem from the asymmetry in the energy potential and are essentially thresholdless. This asymmetry is readily achievable when an external magnetic field with a strength comparable to the magnetic anisotropy field is applied close to the hard axis. This work establishes a connection between the geometry of the energy profile and nonlinear responses, paving the way for designing magnonic devices with controlled harmonic generation and nonlinear spin wave interaction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_21796 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Harnessing magnetic anisotropy for nonlinear magnetization precession and spin waves Gerevenkov, P. I. Shelukhin, L. A. Filatov, Ia. A. Dvortsova, P. A. Kalashnikova, A. M. Materials Science The nonlinearity of magnetization precession and spin waves is a cornerstone of contemporary magnonics. We investigate nonlinear magnetization dynamics in a thin epitaxial iron film driven by femtosecond laser pulses in regimes of homogeneous precession and propagating magnetostatic spin wave packets. The magnetization precession anharmonicity, the generation of higher-order harmonics, and the dynamical rectification are experimentally demonstrated. The numerical solution of the non-linearized Landau-Lifshitz-Gilbert equation reveals that these effects stem from the asymmetry in the energy potential and are essentially thresholdless. This asymmetry is readily achievable when an external magnetic field with a strength comparable to the magnetic anisotropy field is applied close to the hard axis. This work establishes a connection between the geometry of the energy profile and nonlinear responses, paving the way for designing magnonic devices with controlled harmonic generation and nonlinear spin wave interaction. |
| title | Harnessing magnetic anisotropy for nonlinear magnetization precession and spin waves |
| topic | Materials Science |
| url | https://arxiv.org/abs/2602.21796 |