Antiskyrmions and their electrical footprint in crystalline mesoscale structures of Mn$_{1.4}$PtSn
| Autor: | Moritz Winter, Francisco J. T. Goncalves, Ivan Soldatov, Yangkun He, Belén E. Zúñiga Céspedes, Peter Milde, Kilian Lenz, Sandra Hamann, Marc Uhlarz, Praveen Vir, Markus König, Philip J. W. Moll, Richard Schlitz, Sebastian T. B. Goennenwein, Lukas M. Eng, Rudolf Schäfer, Joachim Wosnitza, Claudia Felser, Jacob Gayles, Toni Helm |
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| Rok vydání: | 2021 |
| Předmět: |
Condensed Matter - Materials Science
Condensed Matter - Mesoscale and Nanoscale Physics Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Physics - Applied Physics Applied Physics (physics.app-ph) states Condensed Matter - Other Condensed Matter Condensed Matter::Materials Science Mechanics of Materials Mesoscale and Nanoscale Physics (cond-mat.mes-hall) General Materials Science skyrmion lattice Other Condensed Matter (cond-mat.other) |
| Zdroj: | Communications Materials 3(2022), 102 Communications Materials |
| DOI: | 10.48550/arxiv.2111.02494 |
| Popis: | Skyrmionic materials hold the potential for future information technologies, such as racetrack memories. Key to that advancement are systems that exhibit high tunability and scalability, with stored information being easy to read and write by means of all-electrical techniques. Topological magnetic excitations such as skyrmions and antiskyrmions, give rise to a characteristic topological Hall effect. However, the electrical detection of antiskyrmions, in both thin films and bulk samples has been challenging to date. Here, we apply magneto-optical microscopy combined with electrical transport to explore the antiskyrmion phase as it emerges in crystalline mesoscale structures of the Heusler magnet Mn$_{1.4}$PtSn. We reveal the Hall signature of antiskyrmions in line with our theoretical model, comprising anomalous and topological components. We examine its dependence on the vertical device thickness, field orientation, and temperature. Our atomistic simulations and experimental anisotropy studies demonstrate the link between antiskyrmions and a complex magnetism that consists of competing ferromagnetic, antiferromagnetic, and chiral exchange interactions, not captured by micromagnetic simulations. Comment: 30 pages, 4 figures, Supplementary Information with additional 22 pages and 16 figures |
| Databáze: | OpenAIRE |
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