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MA: Fachverband Magnetismus
MA 3: Magnetic Textures: Statics and experimental imaging
MA 3.2: Vortrag
Montag, 20. März 2017, 09:45–10:00, HSZ 101
General classification of skyrmions among almost all space groups — •Miriam Hinzen1,2, Stefan Blügel1, and Christof Melcher2 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — 2Department of Mathematics I & JARA FIT, RWTH Aachen University, 52056 Aachen, Germany
In the past years, magnetic B20 compounds have been in the focus of research as prototype materials exhibiting chiral magnetic skyrmions at particular temperatures and magnetic fields. These compounds belong to the space group T. However, there are crystal classes with Dzyaloshinskii-Moriya interaction (DMI) that favour a different two-dimensional magnetic structure, some of which even have a different topological charge. Naturally, the question arises whether there is a possibility to transfer results from one crystal class to another, for example through a transformation formula. We went through all the crystal classes that can form skyrmions and for most of them identified those O(2) symmetry operations relating their magnetization configuration to the one of the B20 compound. Depending on the crystal structure we expect skyrmions or antiskyrmions of vortex, hedgehog or saddle-point type.