Regensburg 2025 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 33: Non-Skyrmonic Magnetic Textures I
MA 33.5: Vortrag
Donnerstag, 20. März 2025, 10:30–10:45, H16
Magnetic solitons in hierarchical 3D magnetic nanoarchitectures of nanoflower shape — •Olha Bezsmertna1, Rui Xu1, Oleksandr Pylypovskyi1, David Raftrey2,3, Andrea Sorrentino4, Jose A. Fernandez-Roldan1, Ivan Soldatov5, Daniel Wolf5, Axel Lubk5, Rudolf Schäfer5, Peter Fischer2,3, and Denys Makarov1 — 1Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany — 2University of California Santa Cruz, Santa Cruz CA, USA — 3Lawrence Berkeley National Laboratory, Berkeley CA, USA — 4Alba Light Source, Cerdanyola del Vallès 08290, Spain — 5Leibniz Institute for Solid State and Materials Research, Dresden, Germany
Curvilinear magnetism is an emerging field that explores how magnetic properties and responses are modified in geometrically curved objects [1]. Here, we synthesize large-scale, highly-periodic 3D nanomembranes [2] of 50-nm-thick permalloy of a nanoflower shape interconnected by close-to-hemispherical indentations. Nanoflowers with a size of about 200 nm exhibit a variety of magnetic states, e.g. domain walls, flower, vortex and a state with two Bloch lines. The ground magnetic state is a vortex, which is shifted away from the geometric center of the nanoflower. Micromagnetic simulations show nonlocal symmetry breaking, which is specific to 3D curved geometries enabling interactions between surface and volume magnetostatic charges, responsible for the shift of the vortex [3]. [1] D. Makarov et al., Springer Nature, Vol. 146 (2022). [2] R. Xu et al., Nature Comm 2022. [3] O. Bezsmertna et al., Nano Lett., doi.org/10.1021/acs.nanolett.4c04584
Keywords: Curvilinear nanomagnetism; 3D nanoarchitectures; Magnetic solitons; Symmetry break