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MA: Fachverband Magnetismus
MA 41: Poster III
MA 41.5: Poster
Donnerstag, 20. März 2025, 15:00–17:30, P3
Local spin textures stabilised by geometrically-induced strain in 2D magnet Fe3GeTe2 — •Yuhan Sun1, Max Birch2, Simone Finizio3,5, Lukas Powalla1, Sayooj Satheesh1, Eberhard Goering1, Bettina Lotsch1, Klaus Kern1, Alexander Holleitner4, Markus Weigand5, Sebastian Wintz5, and Marko Burghard1 — 1Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany — 2RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan — 3Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland — 4Walter Schottky Institute and Physics Department, Technical University of Munich, 85748 Garching, Germany — 5Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institut Nanospektroskopie, 12489 Berlin, Germany
Two-dimensional (2D) van der Waals ferromagnets have emerged as promising platforms for next-generation electronic and spintronic devices. However, achieving precise local control over magnetic domains and spin textures in these materials remains a significant challenge. Here, we demonstrate nanoscale manipulation of magnetism in the 2D ferromagnet Fe3GeTe2 (FGT) using geometrically-induced strain fields. Employing high-resolution scanning transmission X-ray microscopy, we directly visualize the impact of spatially varying uniaxial and shear strain profiles on the magnetic order of FGT sheets stamped onto nanopillar arrays. We observe that a strain of less than 0.5% locally elevates the Curie temperature of FGT by 10 K and stabilizes magnetic textures near the pillar corners.
Keywords: 2D magnet; strain engineering; local strain; STXM; magnetic imaging