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MA: Fachverband Magnetismus
MA 19: POSTER Ia
MA 19.12: Poster
Dienstag, 17. März 2015, 09:30–13:00, Poster A
Simulation of skyrmionic bubbles in thin layers — •Kai Litzius1,2, Benjamin Krüger1, and Mathias Kläui1,2 — 1Johannes Gutenberg-Universität Mainz, Institut für Physik, Staudingerweg 7 55128 Mainz, Germany — 2Graduate School Materials Science, Staudinger Weg 9, 55128 Mainz, Germany
Magnetic bubbles are circular regions of out-of-plane magnetization that is orientated in the opposite direction compared to the surrounding parts of the film [1]. As skyrmionic states, they show a special topology and are thus energetically protected from being deformed into a ferromagnetic uniform state. This ensures a high stability of a bubble and makes them promising candidates for spintronic devices [2].
Here, the static and dynamic properties of magnetic bubbles in thin layers with out-of-plane easy axis are investigated by micromagnetic simulations including the Dzyaloshinskii-Moriya interaction (DMI). We can show that a bubble can indeed be stabilized for a certain parameter range. The obtained states are highly dependent of the choosen saturation magnetization (Ms) and DMI resulting in significant differences in appearance and shape of topology. From our results, we can identify, which materials are ideally suited to stabilize skyrmion states.
[1] P. Milde et al., Science. 2013; 340(6136): 1076-1080.
[2] F. Büttner et al., Nature Physics (in press 2014)