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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/2407.21520 |
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| _version_ | 1866910825293283328 |
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| author | Garanin, Dmitry A. Chudnovsky, Eugene M. |
| author_facet | Garanin, Dmitry A. Chudnovsky, Eugene M. |
| contents | Recently observed scaling in the random-anisotropy model of amorphous or sintered ferromagnets is derived by an alternative method and extended for studying the dynamical properties in terms of the Landau-Lifshitz equations for spin blocks. Switching to the rescaled exchange and anisotropy constants allows one to investigate the dynamics by using a reduced number of variables, which greatly speeds up computations. The proposed dynamical scaling is applied to the problem of microwave absorption by a random anisotropy magnet. The equivalence of the rescaled model to the original atomic model is confirmed numerically. The method is proposed as a powerful tool in studying static and dynamic properties of systems with quenched randomness. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_21520 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Scaling of Static and Dynamical Properties of Random Anisotropy Magnets Garanin, Dmitry A. Chudnovsky, Eugene M. Disordered Systems and Neural Networks Recently observed scaling in the random-anisotropy model of amorphous or sintered ferromagnets is derived by an alternative method and extended for studying the dynamical properties in terms of the Landau-Lifshitz equations for spin blocks. Switching to the rescaled exchange and anisotropy constants allows one to investigate the dynamics by using a reduced number of variables, which greatly speeds up computations. The proposed dynamical scaling is applied to the problem of microwave absorption by a random anisotropy magnet. The equivalence of the rescaled model to the original atomic model is confirmed numerically. The method is proposed as a powerful tool in studying static and dynamic properties of systems with quenched randomness. |
| title | Scaling of Static and Dynamical Properties of Random Anisotropy Magnets |
| topic | Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2407.21520 |