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Journal Article

Electrical writing, deleting, reading, and moving of magnetic skyrmioniums in a racetrack device

MPS-Authors
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Göbel,  Börge
Max Planck Institute of Microstructure Physics, Max Planck Society;

Mertig,  Ingrid
Max Planck Institute of Microstructure Physics, Max Planck Society;

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Parkin,  Stuart S. P.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Citation

Göbel, B., Schäffer, A., Berakdar, J., Mertig, I., & Parkin, S. S. P. (2019). Electrical writing, deleting, reading, and moving of magnetic skyrmioniums in a racetrack device. Scientific Reports, 9: 12119. doi:10.1038/s41598-019-48617-z.


Cite as: http://hdl.handle.net/21.11116/0000-0008-DF76-9
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.