Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.3: Poster
Dienstag, 6. September 2022, 17:30–20:00, P2
Limits of skyrmion detection — •Hauke Lars Heyen1, Jakob Walowski1, Malte Römer-Stumm2, Markus Münzenberg1, and Jeffrey McCord2 — 1Institut für Physik, Universität Greifswald, Felix-Hausdorff-Straße 6, 17489 Greifswald, Germany — 2Christian-Albrechts-Universität zu Kiel, Institute for Materials Science, Nanoscale Magnetic Materials and Magnetic Domains, 24143 Kiel, Germany
Skyrmion detection is an important feature for the implementation in storage media like e.g. racetrack memory. Kerr microscopy is well suited for the detection of skyrmions on the micrometer scale, but can not be miniaturised down to the nanometer scale. To compete with established storage media methods, miniaturisation of detection methods is essential. Magnetic tunnel junctions (MTJ) are a promising tool to detect small magnetisation changes.
The selected Ta/CoFeB/MgO material system allows to build MTJs integrated into tracks in which skyrmions can be generated and moved along using current pulses. This integration of MTJs into skyrmion racetracks remains challenging, even though they work fine independently. We employ Kerr microscopy to investigate the influence of MTJs on the skyrmion generation and propagation.