Berlin 2018 – wissenschaftliches Programm
MA 35.12: Vortrag
Mittwoch, 14. März 2018, 17:45–18:00, EB 301
Magnetic skyrmions in curvilinear films — •Volodymyr Kravchuk1,2, Denis Sheka3, Attila Kakay4, Oleksii Volkov4, Ulrich Roessler1, Jeroen van den Brink1, Denys Makarov4, and Yuri Gaididiei2 — 1Leibniz-Institut fuer Festkoerper- und Werkstoffforschung, D-01171 Dresden, Germany — 2Bogolyubov Institute for Theoretical Physics of National Academy of Sciences of Ukraine, 03680 Kyiv, Ukraine — 3Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine — 4Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
Topological magnetic solitons on curvilinear magnetic films acquire new properties if the curvature radius is comparable with the size of the soliton. Earlier we demonstrated  that ferromagnetic skyrmions can be stabilized due to the curvature effects only without intrinsic chiral magnetic interactions. However, the curvature induced skyrmion is an excitation of the ground state, as well as a skyrmion in a planar film. Here we show that the combined action of the curvature and the chiral interaction can make skyrmion the ground state of the system . Moreover, ferromagnetic skyrmion pinned on a curvilinear defect demonstrates a discrete set of equilibrium states. Transitions between different states can be controlled by external magnetic field. Thus, the periodically arranged curvilinear defects can result in a reconfigurable skyrmion lattice. This opens new perspectives on processing and storing of the information.
 V. Kravchuk et al., BRB 94, 144402 (2016).  V. Kravchuk et al., arXiv 1706.05653 (2017).