SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Magnetic Imaging Techniques II
MA 43.5: Vortrag
Donnerstag, 30. März 2023, 16:00–16:15, HSZ 401
Tailoring magnetic switching via topology in nanoimprinted networks of Pt/Co/Pt caps on flexible membranes — •Jose A. Fernandez-Roldan1, Rui Xu1, Oleksii Volkov1, Oleksandr Pylypovskyi1, Ivan Soldatov2, Andreas Worbs1, Rene Hübner1, Rudolf Schäfer2, Jürgen Fassbender1, and Denys Makarov1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Leibniz IFW, Dresden, Germany
Perpendicular magnetic bit media consist of regular rigid nanostructured networks where data is stored in decoupled nanostructures. Flexible magnetic nanoelectronic devices rely on curvature-induced effects that introduce topological patterning [1]. We prepared arrays of magnetic bits with a size of 400 nm arranged in close-packed square and hexagonal arrays of Pt/Co/Pt cap-like structures on PDMS elastic membranes by means of nanoprinting and Al anodization. The magnetization reversal process indicates a magnetically decoupled switching process in the individual caps of the square array in contrast to the hexagonal array. Here we propose a method to evaluate this coupling by means of analysis of a series of field-dependent MOKE images. The results indicate that the magnetic coupling between the caps can be quantitatively characterized in terms of a fractal dimension. Overall, these results suggest that the magnetization switching in densely-packed networks can be tailored via topology.
References: [1] D. Makarov et al., Adv. Mater. 34, 2101758 (2022)