Ferromagnetic Relaxation. III. Theory of Instabilities
- 15 April 1963
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 130 (2) , 632-638
- https://doi.org/10.1103/physrev.130.632
Abstract
In this paper a quantum-mechanical model is used to investigate various instability processes in ferromagnetic insulators. Time-dependent perturbation theory is employed to find the condition for which the rate of energy flowing into a magnon or phonon is equal to the rate at which it relaxes. This leads to a general instability criterion for various magnon-magnon, photon-magnon, and magnon-phonon processes.Keywords
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