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Frequency dependence of spin relaxation in periodic systems

Barsukov, I.; Römer, F. M.; Meckenstock, R.; Lenz, K.; Lindner, J.; Hemken To Krax, S.; Banholzer, A.; Körner, M.; Grebing, J.; Fassbender, J.; Farle, M.

Abstract

As a common method to separate intrinsic and extrinsic spin relaxation processes in a ferromagnet, their frequency dependence is employed. We show, that this current approach may be insufficient for a large class of ferromagnetic systems, since the extrinsic spin relaxation can exhibit non-monotonous, periodic frequency dependence, as demonstrated by a good agreement of ferromagnetic resonance experiment and phenomenologic theory.

Keywords: ferromagnet; magnetic relaxation; magnon-magnon scattering; magnetic resonance; thin films; ion beam irradiation

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Permalink: https://www.hzdr.de/publications/Publ-15480