Berlin 2015 – scientific programme
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MA: Fachverband Magnetismus
MA 20: POSTER Ib
MA 20.33: Poster
Tuesday, March 17, 2015, 09:30–13:00, Poster A
Dynamics and inertia of skyrmionic spin structures — F. 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. Eisebitt3,5 — 1Institut 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)]