SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Skyrmions II (joint session MA/KFM)
MA 17.2: Vortrag
Freitag, 1. Oktober 2021, 10:30–10:45, H5
Current-induced H-shaped-skyrmion creation and their dynamics in the helical phase — •Ross Knapman1, Davi R Rodrigues2, Jan Masell3, and Karin Everschor-Sitte2,4 — 1Institute of Physics, Johannes Gutenberg University Mainz, 55128 Mainz, Germany — 2Faculty of Physics, University of Duisburg-Essen, 47057 Duisburg, Germany — 3RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan — 4Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, 47057 Duisburg, Germany
A promising application of magnetic skyrmions is in racetrack memory devices. [1] While efforts focussing on this have often been concentrated on the use of ferromagnetic racetracks, previous work has suggested that the use of helimagnets could be more effective. [2] Here, the helices provide a means to naturally confine the skyrmions to quasi-1D channels, mitigating the skyrmion Hall effect. They additionally allow for high-speed skyrmion motion. Inspired by previous works in which it is suggested that skyrmions can be created through the interplay of spin-polarized currents and magnetic impurities, [3] we propose a method of creating skyrmions in a helical background. [4]
[1] Fert, A et. al., Nat. Nanotechnol. 8(3), 152-156 (2013).
[2] Müller, J. et.al., Phys. Rev. Lett. 119(13), 137201 (2017).
[3] Everschor-Sitte, K. et. al., New J. Phys. 19(9), 092001 (2017).
[4] Knapman, R. et. al., J. Phys. D: Appl. Phys. 54(40). 404003 (2021).