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

MPG-Autoren
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Göbel,  Börge
Max Planck Institute of Microstructure Physics, Max Planck Society;
International Max Planck Research School for Science and Technology of Nano-Systems, 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;

Externe Ressourcen

https://doi.org/10.1038/s41598-019-48617-z
(Verlagsversion)

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s41598-019-48617-z.pdf
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Zitation

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.


Zitierlink: https://hdl.handle.net/21.11116/0000-0008-DF76-9
Zusammenfassung
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.