High-power ferromagnetic resonance without a degenerate spin-wave manifold
- 1 January 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 64 (1) , 64-67
- https://doi.org/10.1103/physrevlett.64.64
Abstract
The nonlinear dynamics of the main magnetoexchange branch of a circular thin (0.45 μm) film of yttrium iron garnet are investigated at perpendicular resonance. Distinct ‘‘fingers of auto-oscillation’’ arise from each magnetoexchange mode in the low-power spectrum. A set of equations of motion derived from a microscopic Hamiltonian are integrated to compare with experiment. In the first finger, the model predicts the power for onset of auto-oscillation to within 1 dB of the experiment and the frequency to within 15%.Keywords
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