Surface dynamics of rough magnetic films
arXiv:1901.11046 · doi:10.1103/PhysRevB.99.174402
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.
12 pages, 6 figures
References in corpus (6)
- Strongly coupled magnons and cavity microwave photons
- Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
- Triple-resonant Brillouin light scattering in magneto-optical cavities
- Measurements of the exchange stiffness of YIG films by microwave resonance techniques
- Magnetization oscillations and waves driven by pure spin currents
- Surface sensitivity of the spin Seebeck effect