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MA: Fachverband Magnetismus
MA 33: Non-Skyrmonic Magnetic Textures I
MA 33.7: Vortrag
Donnerstag, 20. März 2025, 11:00–11:15, H16
Topological textures in antiferromagnetic thin-films stabilized by interfacial magnetostrictive destressing — •Lukas D Cavar1, Julian Skolaut2, Olena Gomonay1, Simon J Sochiera1, David Anthofer1, Miela Gross3, Evangelos Golias4, Dirk Backes5, Caroline A Ross3, and Angela Wittmann1 — 1JGU, Mainz, DE — 2IEAP, CAU, Kiel, DE — 3MIT, Cambridge, USA — 4MAX IV, Lund, SE — 5DLS, Didcot, UK
Weakly-compensated antiferro- and ferrimagnets present us with ultrafast dynamics, along with a weak magnetization vector that is legible, accessible, and robust to external perturbations. This makes them ideal candidates for the next generation of computing materials, where information may be encoded in the form of topological magnetic textures. Conventional long-range interaction– namely, the stray field– is not sufficient to stabilize such textures on its own. Here we discuss the magnet-substrate interface, where a magnetostriction-dependent interfacial incompatibility gives rise to long-range destressing fields capable of stabilizing topological textures in easy-plane magnetic thin-films with nearly-compensating staggered spin ordering. We investigate two such materials– α-Fe2O3 (hematite) and dysprosium iron garnet (DyIG) near its compensation temperature– by x-ray magnetic linear dichroism microscopy and indeed observe a rich landscape of topological textures. Thereby we tread towards a rigorous understanding of the interfacial destressing field and begin to uncover a promising new source of topological mesostructure.
Keywords: topological texture; 360-degree domain walls; magnetoelastic coupling; interfacial destressing; topologically protected