Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster I

MA 19.30: Poster

Dienstag, 1. April 2014, 13:00–15:30, P1

Tailored charges in Néel walls by tailoring anisotropies in artificial domains in exchange bias layer systems — •Alexander Gaul, Martin Wilke, Dennis Holzinger, and Arno Ehresmann — Department of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel

The angle between the magnetization orientation of adjacent in-plane magnetized domains and the angle of the magnetizations relative to the domain wall plane was systematically varied in topographically flat exchange bias samples by ion bombardment induced magnetic patterning (IBMP). The different domain configurations reveal different amounts of magnetic charges in the domain walls, hence, leading to different charge contrasts in the magnetic force microscope (MFM) signals. The experiments are compared to simulations, where the magnetic charge contrast was obtained from the spatial magnetization distribution of the sample calculated by the object oriented micromagnetic framework (Oommf). The experimental and simulation data was analyzed for changes in domain wall widths, symmetries and the relative amounts of magnetic net charges. These experiments highlight the ability to tailor domain walls, magnetic charges and therefore magnetic stray fields in one and the same layer system.