Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 54: Spin Hall Effects and Skyrmions II

MA 54.2: Vortrag

Donnerstag, 23. März 2017, 15:15–15:30, HSZ 04

Skyrmions and magnetic singularities in confined geometries — •Gideon P. Müller, Nikolai S. Kiselev, and Stefan Blügel — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

Interest in chiral magnetic skyrmions is rising because they are suggested as new information carriers in spintronic devices, such as the skyrmion racetrack. This necessitates a deep understanding of the mechanism of skyrmion nucleation and anihilation in these systems. We apply the recently proposed geodesic nudged elastic band method to explore different skyrmion nucleation/annihilation mechanisms in the systems by analysing corresponding minimum energy paths (MEPs) and energy barriers. We compare such MEPs for skyrmion nucleation with different geometries, in particular thin films, nanostripes and nanowires. For the case of nanowires in a certain range of material parameters we found stable particle-like objects composed of coupled magnetic singularities known as Bloch points. The discovery of this effect can have potential application in spintronics.