Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 55: Skyrmions III
MA 55.9: Vortrag
Freitag, 13. März 2026, 11:45–12:00, HSZ/0004
Correlating on-the-fly Electrical and Optical Skyrmion Readout — •Grischa Beneke1, Kilian Leutner1, Nikhil Vijayan1,2, Fabian Kammerbauer1, Duc Minh Tran1, Sachin Krishnia1, Johannes Güttinger2, Armin Satz2, Robert Frömter1, and Mathias Kläui1 — 1Institute of Physics, Johannes Gutenberg University Mainz, Germany — 2Infineon Technologies Austria AG, Austria
Magnetic skyrmions, topologically stabilized spin textures, are promising candidates for memory devices and non-conventional computing due to their stability, non-linear interactions, and low-power manipulation. However, reliable electrical readout of individual skyrmions remains a fundamental challenge, as current magnetic tunnel junction and anomalous Hall effect techniques fail to reliably detect single moving skyrmions. Our approach leverages thermally activated skyrmions, where a low constant drive current simultaneously drives skyrmion motion and the Hall voltage necessary for detection. We demonstrate reliability through real-time correlation between Hall voltage signals and direct Kerr microscopy imaging. Two consecutive Hall crosses enable skyrmion velocity determination in accordance with Kerr microscopy videos [1]. We present an analytical formula for the skyrmion AHE readout signal, demonstrating scalability from micrometer to nanometer dimensions. These advances establish a robust platform for skyrmion-based sensors, counters, and unconventional computing systems requiring precise individual skyrmion control and detection. [1] G. Beneke et al., Accepted for publication in Appl. Phys. Lett., arXiv:2508.15519 (2025).
Keywords: Skyrmion; anomalous Hall effect; Sensor; electrical readout; Kerr microscopy