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MA: Magnetismus

MA 28: Spindynamik / Ummagnetisierungsvorg
änge

MA 28.9: Talk

Thursday, March 11, 2004, 17:15–17:30, H23

Damping in thin NiFe films — •Hans Nembach, Markus C. Weber, Jürgen Fassbender, and Burkard Hillebrands — Fachbereich Physik und Forschungsschwerpunkt MINAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 56, 67663 Kaiserslautern

We investigated the damping and spin wave creation in thin NiFe films with time-resolved magneto-optic Kerr effect magnetometry for small and large angle excitations. To gain further insight in the underlying damping process we employ a special measurement procedure, which allows us to determine all three magnetization vector components and therefore the length of the magnetization vector. A reduction of the magnitude of the magnetization vector indicates the creation of spin waves. These spin waves can be created directly by the stripline or by multi-magnon processes.
The experimentally determined magnetization trajectory is compared with numerical simulations based on the Landau-Lifshitz equation, and the damping constant is extracted from these simulations