Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 7: Magnetic Textures: Statics and Imaging I

MA 7.11: Vortrag

Montag, 1. April 2019, 18:00–18:15, H37

Chiral Magnetic Skyrmions with Arbitrary Topological ChargeFilipp N. Rybakov1 and •Nikolai N. Kiselev21Department of Physics, KTH-Royal Institute of Technology, SE-10691 Stockholm, Sweden — 2Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany

In many work related to study of magnetic skyrmions one can find the statement that in a conventional model of a chiral magnet the coexistence of stable skyrmion solutions with Q=*1 and Q= 1 is impossible. In this presentation we show that in fact a conventional model of chiral ferro- and antiferromagnets possesses an infinite number of skyrmion solutions with different value and sign of topological charge [1]. We provide a detailed description of the diverse morphology of new skyrmions and the corresponding energy dependencies of skyrmions with respect to their topological charge. Because the considered model is general it is expected that predicted phenomenon may occur in various compaunds including atomic layers, e.g., PdFe/Ir(111), rhombohedral GaV4S8 semiconductor, B20-type alloys as Mn1−xFexGe, Mn1−xFexSi, Fe1−xCoxSi, Cu2OSeO3, acentric tetragonal Heusler compounds.

[1] F. N. Rybakov, N. S. Kiselev, Chiral Magnetic Skyrmions with Arbitrary Topological Charge, arXiv:1806.00782

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