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Updated: Aug 10, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
Time-resolved measurement of propagating spin waves in ferromagnetic thin films
M Covington1, T M Crawford, G J Parker
1Seagate Research, 1251 Waterfront Place, Pittsburgh, Pennsylvania 15222, USA. Mark.Covington@seagate.com
Abstract:
We measure the propagation of spatially localized spin waves in NiFe thin films through local inductive detection of the dynamic magnetization. A pulsed magnetic field excites a linear superposition of spin wave modes with a distribution that is predominantly driven by the spatial dependence of the in-plane excitation field. The results of numerical micromagnetic calculations exhibit excellent agreement with experiment and show that a comprehensive account of spatial nonuniformity and propagation is necessary to accurately measure the intrinsic damping rate.
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