Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: POSTER Ia

MA 19.40: Poster

Dienstag, 17. März 2015, 09:30–13:00, Poster A

Ramifications of the bombardment of exchange bias bilayers with low energy Helium ions — •Henning Huckfeldt and Arno Ehresmann — Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

The use of low energy Helium ions as flexible and feasible tool to modify the magnetic properties of exchange bias material systems in magnitude and/or coupling direction is known for more than a decade. While a number of models were proposed describing the link between structural effects evoked by ion bombardment and the change in magnetic properties experimental proof was hard to find. We present results of a novel experimental approach to investigate the effect using Helium ion bombardment of exchange bias layers in the absence of an external magnetic field to separate between the effects of local heating leading to a relaxation of the coupling direction and effects caused by structural defects due to collision cascades in the material.