Dresden 2011 – scientific programme

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MA: Fachverband Magnetismus

MA 19: Poster I (Bio- and Molecular Magnetism/ Magnetic Particles and Clusters/ Micro- and Nanostructured Magnetic Materials/ Magnetic Materials/ Multiferroics/ Magnetic Shape Memory Alloys/ Electron Theory of Magntism/ Spincaloric Transport/ Magnetic Coupling and Exchange Bias/ Magnetization Dynamics/ Micromagnetism and Computational Magnetics)

MA 19.83: Poster

Tuesday, March 15, 2011, 10:45–13:00, P2

Temperature dependent propagating spin-wave spectroscopy on permalloy thin films — •Thomas Schwarze, Florian Brandl, Rupert Huber, Sebastian Neusser, Georg Dürr, and Dirk Grundler — Lehrstuhl für Physik funktionaler Schichtsysteme, Technische Universität München, Physik Department, James-Franck-Straße 1, D-85747 Garching b. München, Germany

The study of spin wave propagation in thin films is of great interest, both, fundamentally as well as technologically [1]. In order to get a deeper understanding of the underlying physics we apply broadband all-electrical spin-wave spectroscopy [2] to a thin permalloy film and address temperatures ranging from 4 to 400 K. The external magnetic field of up to 2.5 T is applied perpendicular to the film. We present a thorough study of the temperature dependent variation of the resonance field and frequency, the resonance linewidth, the Gilbert damping α, and group velocities. For each of the relevant parameters a distinct temperature dependence is found and will be discussed. We acknowledge financial support through the European Community*s Seventh Framework Programme (FP7/2007-2013) under Grant Agreement no. 228673 MAGNONICS and the excellence cluster *Nanosystems Initiative Munich*. [1] S. Neusser and D. Grundler, Adv. Materials 21, 2927 (2009) [2] S. Neusser et al., Phys. Rev. Lett. 105, 067208 (2010)