Issue |
EPL
Volume 148, Number 2, October 2024
|
|
---|---|---|
Article Number | 26001 | |
Number of page(s) | 6 | |
Section | Condensed matter and materials physics | |
DOI | https://doi.org/10.1209/0295-5075/ad8372 | |
Published online | 15 October 2024 |
Scaling of static and dynamical properties of random anisotropy magnets
Physics Department, Herbert H. Lehman College and Graduate School, The City University of New York 250 Bedford Park Boulevard West, Bronx, NY 10468-1589, USA
Received: 31 July 2024
Accepted: 4 October 2024
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.
© 2024 EPLA
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