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arXiv · 2008.03423

Two-magnon frequency-pulling effect in ferromagnetic resonance

W. K. Peria·H. Yu·S. Lee·I. Takeuchi·P. A. Crowell
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Abstract

We report the experimental observation in thin films of the hybridization of the uniform ferromagnetic resonance mode with nonuniform magnons as a result of the two-magnon scattering mechanism, leading to a frequency-pulling effect on the ferromagnetic resonance. This effect, when not properly accounted for, leads to a discrepancy in the dependence of the ferromagnetic resonance field on frequency for different field orientations. The frequency-pulling effect is the complement of the broadening of the ferromagnetic resonance lineshape by two-magnon scattering and can be calculated using the same parameters. By accounting for the two-magnon frequency shifts through these means, consistency is achieved in fitting data from in-plane and perpendicular-to-plane resonance conditions.

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W. K. Peria, H. Yu, S. Lee, I. Takeuchi, P. A. Crowell. 2020-08-08. Two-magnon frequency-pulling effect in ferromagnetic resonance. https://doi.org/10.1063/5.0024576

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