Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 15: Magnetism Poster A
MA 15.3: Poster
Dienstag, 2. April 2019, 10:00–13:00, Poster E
Electrical writing, deleting, reading, and moving of magnetic skyrmioniums in a racetrack device — Börge Göbel1, •Alexander F. Schäffer2, Jamal Berakdar2, and Ingrid Mertig1,2 — 1Max-Planck-Institut für Mikrostrukturphysik, D-06120 Halle (Saale), Germany — 2Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Saale), Germany
A magnetic skyrmionium (also called 2π-skyrmion) can be understood as a skyrmion — a topologically non-trivial magnetic whirl — which is situated in the center of a second skyrmion with reversed magnetization.
In this contribution, 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 ‘1’ and its absence as ‘0’ bit.