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MA: Fachverband Magnetismus
MA 4: Micro- and Nanostructured Materials
MA 4.2: Talk
Monday, March 16, 2015, 10:00–10:15, H 1012
Magnetization reversal in fourfold ferromagnetic nanostructures of different dimensions — •Andrea Ehrmann1, Tomasz Blachowicz2, Sara Komraus2, Marie-Kristin Nees3, Peter-Jürgen Jakobs3, Harald Leiste3, Michael Mathes4, and Marie Scharschmidt4 — 1Niederrhein University of Applied Sciences, Faculty of Textile and Clothing Technology, Germany — 2Silesian University of Technology, Institute of Physics, Poland — 3Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Germany — 4ACCESS e. V., Aachen, Germany
Ferromagnetic nanostructures with lateral dimensions between 160 nm and 400 nm have been created in a lithographic process. The fourfold particles produced from permalloy have rectangular-shaped walls around a square open area. Their magnetic properties have been measured angle-dependent using the Magneto-Optical Kerr Effect (MOKE). The oral presentation reports on the angle-dependence and the influence of the lithography radiation dose on magnetization reversal mechanisms. While the nanostructure size changes the angle-dependence of the coercivities quantitatively and qualitatively, the magnetic properties are quite stable against variations of the radiation dose, i.e. the wall width, enabling reliable creation of nanostructures with the desired properties [1].
[1] A. Ehrmann, T. Blachowicz, S. Komraus, M.-K. Nees, P.-J. Jakobs, H. Leiste, M. Mathes, M. Schaarschmidt: Directional-dependent MOKE measurements on fourfold ferromagnetic nanostructures of different dimensions, submitted