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Regensburg 2010 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 10: Poster I

MA 10.59: Poster

Dienstag, 23. März 2010, 10:45–13:45, Poster A

Interaction of surface acoustic waves with magnetization dynamics — •Rupert Huber1, Mathias Weiler2, Sebastian T.B. Goennenwein2, Sebastian Neusser1, and Dirk Grundler11Lehrstuhl für Physik funktionaler Schichtsysteme, Technische Universität München, Physik Department, James-Franck-Str. 1, 85747 Garching b. München, Germany — 2Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Strasse 8, 85748 Garching b. München, Germany

The authors investigate the transmission of surface acoustic waves (SAWs) in the GHz regime through thin ferromagnetic films (FM) deposited on a LiNbO3 substrate. We use e.g. Co and FeCoV. When applying an in-plane magnetic field H under different orientations we find characteristic angular dependencies of the SAW’s amplitude and phase on H. We discuss our observation in terms of the magnetic field dependent change of elastic properties of the FM/LiNbO3 hybrid systems. The dependencies are investigated in detail by comparing FeCoV and Co. FeCoV is magnetically isotropic, whereas Co shows a pronounced magnetic anisotropy. We find a significant difference for the SAW transmission characteristics. The work has been supported by the German Excellence Cluster "Nanosystems Initiative Munich".


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