Regensburg 2025 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 6: Skyrmions I
MA 6.6: Vortrag
Montag, 17. März 2025, 16:30–16:45, H16
Skyrmion lattices emerging from magnetic dipolar interactions — Elizabeth M Jefremovas1, •Kilian Leutner1, Miriam G. Fischer1, Jorge Marqués-Marchán2, Thomas B. Winkler1, Agustina Asenjo2, Jairo Sinova1,3, Robert Frömter1, and Mathias Kläui1,4 — 1Institute of Physics, Johannes Gutenberg University Mainz, 55128 Mainz, Germany — 2Institute of Material Science of Madrid – CSIC, 28049 Madrid, Spain — 3Department of Physics, Texas A&M University, College Station, Texas, USA — 4Center for Quantum Spintronics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
Magnetic skyrmions are well-studied two-dimensional topological spin textures. Surprisingly, little is known about the mutual interactions of dipolar-stabilized skyrmions. By engineering a magnetic multilayer stack, we stabilize for 1 to 30 repetitions skyrmion lattices at room temperature and zero field. Using Kerr microscopy and Magnetic Force Microscopy we observe a drastic decrease in skyrmion size as the number of repetitions is increased. We present an analytical model to describe the skyrmion radius and periodicity from the single-layer to the thick-film limit and complement this with micromagnetic simulations. Additionally, we identify the critical role of the nucleation process in forming the skyrmion lattice. Our work provides a comprehensive understanding of skyrmion-skyrmion interactions, which are driven by dipolar interactions as the multi-layer stack thickness increases.
[1] E. M. Jefremovas et al., arXiv:2407.00539 (2024)
Keywords: Skyrmion lattices; Skyrmions; Kerr microscopy; Magnetic force microscopy; Micromagnetism