Time-resolved measurement of propagating spin waves in ferromagnetic thin films

Phys Rev Lett. 2002 Dec 2;89(23):237202. doi: 10.1103/PhysRevLett.89.237202. Epub 2002 Nov 13.


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.