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 $\exp \{-|t/{\tau }_{3/2}{|}^{3/2}\}$. This behavior as well as the dependence of the decay time ${\tau }_{3/2}$ on roughness parameters are confirmed by micromagnetic simulations.

• Received 6 October 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.257204