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Updated: Jan 20, 2026
Electric and Magnetic Field Devices for Stimulation of Biological Tissues
Published on: May 15, 2021
Electrical writing, deleting, reading, and moving of magnetic skyrmioniums in a racetrack device
Börge Göbel1, Alexander F Schäffer2, Jamal Berakdar3
1Max-Planck-Institut für Mikrostrukturphysik, D-06120, Halle, Saale, Germany. bgoebel@mpi-halle.mpg.de.
Abstract:
A magnetic skyrmionium (also called 2π-skyrmion) can be understood as a skyrmion-a topologically nontrivial magnetic whirl-which is situated in the center of a second skyrmion with reversed magnetization. Here, we propose a new optoelectrical writing and deleting mechanism for skyrmioniums in thin films, as well as a reading mechanism based on the topological Hall voltage. Furthermore, we point out advantages for utilizing skyrmioniums as carriers of information in comparison to skyrmions with respect to the current-driven motion. We simulate all four constituents of an operating skyrmionium-based racetrack storage device: creation, motion, detection and deletion of bits. The existence of a skyrmionium is thereby interpreted as a '1' and its absence as a '0' bit.
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