Damping of Magnetization Dynamics by Phonon Pumping

Journal article (2018)

Authors

S.D. Streib QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Hedyeh Keshtgar Institute for Advanced Studies in Basic Sciences, Zanjan
G.E. Bauer QN/Bauer Group - AS , Kavli institute of nanoscience Delft, Tohoku University
Research Group
QN/Bauer Group (AS) (TU Delft)
Copyright: © 2018 S.D. Streib, Hedyeh Keshtgar, G.E. Bauer
DOI: https://doi.org/10.1103/PhysRevLett.121.027202
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Published Date

2018

Language

English

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Bauer Group

Abstract

We theoretically investigate pumping of phonons by the dynamics of a magnetic film into a nonmagnetic contact. The enhanced damping due to the loss of energy and angular momentum shows interference patterns as a function of the resonance frequency and magnetic film thickness that cannot be described by viscous ("Gilbert") damping. The phonon pumping depends on the magnetization direction as well as geometrical and material parameters and is observable, e.g., in thin films of yttrium iron garnet on a thick dielectric substrate.