SKM 2021 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 12: INNOMAG e.V. Dissertationspreis / Ph.D. Thesis Prize (2021)

MA 12.1: Vortrag

Mittwoch, 29. September 2021, 14:30–14:55, H2

Emergent electrodynamics in non-collinear spin textures: skyrmions and beyond — •Börge Göbel — Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Germany

Magnetic skyrmions have attracted an enormous research interest since their discovery a decade ago. Especially the non-trivial real-space topology of these nano-whirls leads to fundamentally interesting and technologically relevant consequences like an enormous stability and the emergence of a topological Hall effect [1]. One issue, which is hindering the realization of spintronic applications, is the so-called skyrmion Hall effect: A skyrmion does not move parallel to an applied spin-polarized current. Instead, the skyrmion is pushed towards the edge of the sample where it annihilates. In this talk, I will present several ways, how this effect can be suppressed. Therefore, I will give an overview about observed or proposed alternative magnetic quasiparticles [1]. The stabilization, as well as the emergent electrodynamic effects will be discussed for the antiferromagnetic skyrmion [2], the bimeron [3] and the antiskyrmions. For the latter object I will present the observed coexistence with conventional skyrmions [4] which allows to suggest an advanced, less susceptible version of the racetrack data storage device.

References: [1] B. Göbel et al. Physics Reports 895, 1 (2021) [2] B. Göbel et al. PRB 96, 060406 (2017) [3] B. Göbel et al. PRB 99, 060407 (2019) [4] J. Jena*, B. Göbel* et al. Nature Communications 11, 1115 and Science Advances 6, eabc0723 (2020)