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Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 20: POSTER Ib

MA 20.33: Poster

Dienstag, 17. März 2015, 09:30–13:00, Poster A

Dynamics and inertia of skyrmionic spin structuresF. Büttner1,2,3, C. Moutafis4, •B. Krüger1, M. Schneider3, C. M. Günther3, J. Geilhufe5, C. von Korff Schmising3, J. Mohanty3, A. Bisig1, M. Foerster1, T. Schulz1, C. A. F. Vaz1,6, J. H. Franken7, H. J. M. Swagten7, M. Kläui1, and S. Eisebitt3,51Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, Germany — 2Graduate School Materials Science in Mainz, Mainz, Germany — 3Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Germany — 4Swiss Light Source, Paul Scherrer Institut, Villigen PSI, Switzerland — 5Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany — 6SwissFEL, Paul Scherrer Institut, Villigen PSI, Switzerland — 7Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands

In nano-patterned magnetic thin-film elements bubble skyrmions emerge. Their magnetization points out-of-plane opposite to the remaining part. The dynamics of these structures resembles that of composite quasi-particles. Magnetic bubbles are skyrmions characterized by the topology of their spin vector field. Here, we study the GHz gyrotropic motion of a skyrmion spin structure experimentally using pump-probe X-ray holography. Tracking the bubble position with 3 nm accuracy we report the first experimental observation of the GHz gyrotropic motion of a skyrmion. We found that the inertial mass of the magnetic bubble is much larger than inertia found in any other magnetic system. [F. Büttner, et al., Nature Phys. (accepted)]

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