Nonlinear microscopic relaxation of uniform magnetization precession

Details Nonlinear microscopic relaxation of uniform magnetization precession Nonlinear microscopic relaxation of uniform magnetization precession

2002-11-22

arxiv.org/abs/cond-mat/0211499v1

Physics

Condensed Matter

Materials Science

Presented at MMM'02

Scientific paper

10.1063/1.1543891

Dynamic relaxation for nonlinear magnetization excitation is analyzed. For direct processes, such as magnon-electron scattering and two-magnon scattering, the relaxation rate is determined from the linear case simply by utilizing the magnetization oscillation frequency for nonlinear excitation. For an indirect process, such as slow-relaxing impurities, the analysis gives an additional relaxation term proportional to the excitation level. In all cases the effective magnetization damping is increased compared to Landau-Lifshitz-Gilbert damping.

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