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arXiv · 1901.11046

Surface dynamics of rough magnetic films

Tao Yu·Sanchar Sharma·Yaroslav M. Blanter·Gerrit E. W. Bauer
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Abstract

The chirality of Damon-Eshbach (DE) magnons affects the transport of energy and angular momentum at the surface of magnetic films and spheres. We calculate the surface-disorder-limited dephasing and transport lifetimes of surface modes of sufficiently thick high-quality magnetic films such as yttrium iron garnet. In spite of their chirality surface magnons are not protected, but interact strongly with smooth surface roughness. Nevertheless, for long-range disorder the transport is much less affected by the suppressed back scattering (vertex correction). Moreover, in the presence of roughness ferromagnetic resonance under a \textit{uniform} microwave field can gennerate a considerable amount of surface magnons.

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Tao Yu, Sanchar Sharma, Yaroslav M. Blanter, Gerrit E. W. Bauer. 2019-02-02. Surface dynamics of rough magnetic films. https://doi.org/10.1103/physrevb.99.174402

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