Surface dynamics of rough magnetic films

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

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The chirality of magnetostatic 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 ferromagnetic films such as yttrium iron garnet. Surface magnons are not protected by chirality, but interact strongly with smooth surface roughness. Nevertheless, for long-range disorder, the transport is much less affected by the suppressed backscattering (vertex correction). Moreover, in the presence of roughness, ferromagnetic resonance under a uniform microwave field can generate a considerable number of surface magnons.

Original languageEnglish
Article number174402
JournalPhysical Review B
Volume99
Issue number17
DOIs
Publication statusPublished - 2019 May 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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