Regensburg 2022 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 12: Skyrmions 1 (joint session MA/KFM)

KFM 12.3: Vortrag

Dienstag, 6. September 2022, 10:15–10:30, H37

Current-Induced H-Shaped Skyrmion Creation and Their Dynamics in the Helical Phase — •Ross Knapman1,4, Davi R Rodrigues2, Jan Masell3, and Karin Everschor-Sitte4,51Institute of Physics, Johannes Gutenberg University Mainz, 55128 Mainz, Germany — 2Department of Electrical and Information Engineering, Politecnico di Bari, 70126 Bari, Italy — 3RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan — 4Faculty of Physics, University of Duisburg-Essen, 47057 Duisburg, Germany — 5Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, 47057 Duisburg, Germany

A potential application of magnetic skyrmions is in racetrack memory devices. [1] While efforts have often been concentrated on the use of ferromagnetic and antiferromagnetic 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. Moreover, inspired by previous works which demonstrated electric-current-controlled skyrmion injection at magnetic impurities, [3] we propose a method of creating skyrmions in a helical background. [4]

[1] Fert, A. et. al., Nat. Nanotechnol. 8, 152-156 (2013)

[2] Müller, J. et. al., Phys. Rev. Lett. 119, 137201 (2017)

[3] Everschor-Sitte, K. et. al., New J. Phys. 19, 092001 (2017)

[4] Knapman, R. et. al.  J. Phys. D: Appl. Phys. 54, 404003 (2021)

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