Surface dynamics of rough magnetic films

Journal article (2019)

Authors

T. Yu QN/Bauer Group - AS , Kavli institute of nanoscience Delft
S. Sharma QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Y.M. Blanter QN/Blanter Group - AS , Kavli institute of nanoscience Delft
G.E. Bauer Kavli institute of nanoscience Delft, Tohoku University, QN/Bauer Group - AS
Research Group
QN/Bauer Group (AS) (TU Delft)
Copyright: © 2019 T. Yu, S. Sharma, Y.M. Blanter, G.E. Bauer
DOI: https://doi.org/10.1103/PhysRevB.99.174402
More Info
expand_more

Published Date

2019

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Bauer Group

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.