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MA: Fachverband Magnetismus
MA 13: Micro- and Nanostructured Magnetic Materials
MA 13.5: Talk
Monday, March 18, 2024, 16:00–16:15, EB 407
Geometric tuning of the structural and magnetic properties of magnetic thin films via deposition onto highly ordered arrangements of nanospheres — •Asmaa Qdemat1, Emmanuel Kentzinger1, Johan Buitenhuis2, Sabine Pütter3, Mai Hussein Hamed1, Nadine Seidel4,1, Connie Meinke Bednarski1, Oleg Petracic1,4, and Thomas Brückel1 — 1Jülich Centre for Neutron Science JCNS-2, Forschungszentrum Jülich GmbH, Jülich, Germany — 2Institute for Biological Information Processes, Biomacro molecular Systems and Processes (IBI-4), Forschungszentrum Jülich GmbH, Jülich, Germany — 3Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Garching, Germany — 4Heinrich-Heine-University Düsseldorf, Faculty of Mathematics and Natural Sciences, Düsseldorf, Germany
The use of curved surfaces as substrates for thin film deposition induces lateral variation in film thickness, which allows variation in the deposited material properties. [Co/Pd]n multilayers with differen Co thicknesses were deposited on a flat silicon substrate, and densely packed two-dimensional arrays of silica nanospheres with different radii of curvature formed by improved drop-casting method [1]. Scanning electron microscopy, X-ray reflectivity (XRR), grazing incidence small angle X-ray scattering, SQUID and neutron reflectivity were used to characterise the obtained nanostructure. Compared to the flat multilayer, the cap multilayer shows a different anisotropy axis direction. A change in coercivity as a function of film thickness and radius of curvature is also observed.[1] A. Qdemat, et.al., RSC Adv., 10, 2020
Keywords: Thin film; Curved surfaces; Nanospheres; GISAXS; Polarized neutron reflectivity