Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 25: Skyrmions I (joint session MA/TT)

TT 25.8: Vortrag

Dienstag, 17. März 2020, 11:45–12:00, POT 6

Beyond Skyrmions Utilizing alternative magnetic quasiparticles for spintronics devices — •Börge Göbel1,2, Oleg Tretiakov3, Stuart S. P. Parkin2, and Ingrid Mertig11Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Germany — 2Max-Planck-Institut für Mikrostrukturphysik, Halle (Saale), Germany — 3School of Physics, The University of New South Wales, Sydney, Australia

Skyrmions are considered as the bits in future spintronic devices like the racetrack storage. One issue, which is hindering the realization of this application, 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 give an overview about observed or proposed alternative magnetic quasiparticles. The stabilization, as well as the emergent electrodynamic effects will be discussed for the antiskyrmion, the antiferromagnetic skyrmion, the skyrmionium, and the bimeron. These magnetic objects are either attractive from a fundamental point of view, or are advantageous application-wise.

[1] B. Göbel, A. Mook, J. Henk, I. Mertig. PRB 96, 060406(R) (2017) [2] B. Göbel, A. Schäffer, J. Berakdar, I. Mertig, S. Parkin. Sci. Rep. 9, 12119 (2019) [3] B. Göbel, A. Mook, J. Henk, I. Mertig, O. Tretiakov. PRB 99, 060407(R) (2019) [4] B. Göbel, J. Henk, I. Mertig. Sci. Rep. 9, 9521 (2019)

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