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MA: Fachverband Magnetismus

MA 16: Magnetization and Demagnetization Dynamics I

MA 16.4: Talk

Tuesday, March 8, 2016, 10:15–10:30, H34

Thermally Tunable Coupled Magnetic Vortex Oscillators — •Michael Vogel¹, Johannes Wild¹, Bernhard Zimmermann¹, Michael Müller¹, Claudia K.A. Mewes², Tim Mewes², Josef Zweck¹, and Christian. H. Back¹ — ¹Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Regensburg, Germany — ²MINT Center / Depeartment of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, USA

Recently, the magnetization dynamics in neighboring magnetic vortex oscillators coupled via their stray fields came into focus of research [K. Yu. Guslienko, V. Novosad, Y. Otani, H. Shima, and K. Fukamichi, Phys. Rev. B 65, 024414 (2001)]. The system behaves like damped coupled harmonic oscillators. It has been shown that the dynamics of such systems is strongly influenced by the strength of the magnetostatic interaction given by the distance between the elements and the relative configuration of the core polarizations, i.e., the directions of the out-of-plane magnetization components [A. Vogel, A. Drews, T. Kamionka, M. Bolte, and G. Meier, Phys. Rev. Lett. 105, 037201 (2010)]. The control of the coupling in such an array of magnetic discs is essential to implement logic operations. Here we present a novel technique to control the interaction of two or more vortex oscillators by directly influencing their resonance frequencies harnessing their temperature dependency.