SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 38: Micro- and Nanostructured Magnetic Materials
MA 38.4: Vortrag
Donnerstag, 30. März 2023, 12:15–12:30, HSZ 401
Magneto-optical investigation of 3D-curved toroidal ferromagnetic thin films — •Christian Janzen1, Sapida Akhundzada1, Bhavadip Bharatbhai Rakholiya1, Arne Vereijken1, Claudio Beck1, Piotr Kuświk2, Michał Matczak2,3, Michael Vogel1,4, and Arno Ehresmann1 — 1Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Germany — 2Institute of Molecular Physics, Polish Academy of Science, Poznań, Poland — 3Faculty of Physics, University of Białystok, Poland — 4Department of Materials Science, University of Kiel, Germany
Magnetic thin films, typically examined as flat two-dimensional systems, may be extended to the third dimension by deposition of the magnetic material on curved substrates. To experimentally investigate physical effects induced by the geometry and curvature of a thin film magnet, micron-sized curved structures with minimal surface roughness were prepared by optimized two-photon polymerization lithography processes. These structures are deliberately placed with well-defined lateral as well as axial spacing, leading to periodic arrays where, e.g., the influence of varying magnetostatic interactions between the individual objects can be investigated. In this work, the magnetization reversal of periodic arrays of hemispherical tori with varying lattice geometry of the periodic array will be investigated by magneto-optical Kerr magnetometry/microscopy. The experimental results are further compared with micromagnetic simulations.