Surface roughness induced extrinsic damping in thin magnetic films.
The ferromagnetic relaxation caused by the surface roughness induced 2-magnon scattering is investigated. Approximate analytical solution predicts nonexponential decay of the uniform precession excitations of the form exp[-|t/tau3/2|3/2]. This behavior as well as the dependence of the decay time tau(3/2) on roughness parameters are confirmed by micromagnetic simulations.
Dobin
A Yu
AY
School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA.
Victora
R H
RH