Regensburg 2025 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 41: Poster III

MA 41.20: Poster

Donnerstag, 20. März 2025, 15:00–17:30, P3

Magneto-Optical Kerr microscopy of 3D non-planar non-curved magnetic thin films: simulation and experiment — •Christian Janzen, Florian Ott, Bhavadip Bharatbhai Rakholiya, and Arno Ehresmann — Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology,, University of Kassel, Germany

Extending magnetic thin film systems to the third dimension by deposition of magnetic materials onto defined templating structures results in a further degree of freedom to tailor magnetic properties by shape, topology, and chirality [1]. In this work, we present advances in characterizing such 3D systems utilizing conventional magneto-optical Kerr microscopy [2]. By investigating non-planar and non-curved 3D geometries experimentally as well as theoretically, geometric parameters can be manipulated in a systematic way. With this, the magnetic and non-magnetic contributions to the MOKE can be deconvolved. By studying the influence of geometrical parameters that effectively change the initial polarization of the incident light as well as the angle of incidence, we deepen the understanding of Kerr-microscopic signals measured on 3D curved nanomagnetic systems.

[1] G. Gubbiotti et al, "2025 Roadmap on 3D Nano-magnetism" J.Phys.: Condens. Matter in press, 2024

[2] C. Janzen, et al, "Advancing Kerr-Microscopy Imaging of Three-Dimensional Magnetic Structures", INTERMAG Short papers, Rio de Janeiro, Brazil, pp. 1-2, 2024

Keywords: 3D nano-magnetism; Kerr-microscopy; non-planar magnetic systems; magneto-optical simulations; MOKE