Abstract
Abstract Ferromagnetic resonance (FMR) measured over a large range of frequencies from 1– 70 GHz offers a unique possibility to study the dynamic response of ultrathin ferromagnetic films in the range from nano- to picoseconds. The linewidth of the FMR-signal is commonly believed to follow a linear ω -dependence, the so-called Gilbert-damping. Here we give first experimental evidence that in ultrathin films and interfaces ‘non-Gilbert-like’ damping, namely magnon–magnon scattering is equally important.
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