Berlin 2005 – scientific programme
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MA: Magnetismus
MA 20: Poster:Schichten(1-29),Spintrsp(30-45),Ex-Bias(46-63),Spindyn(64-75),Mikromat.(76-80),Cluster(81-94),Abbv.(95-99),Obflm(100-02),SpElek.(103-09),E-Theo(110-14),Mikromag.(115-16),Spin+PÜ(117-26),Mag.Mat.(127-51),Meth.(152-55),Mol.Mag(156-59),Kondo(160-65
MA 20.47: Poster
Monday, March 7, 2005, 14:00–18:00, Poster TU C
Initialization of unidirectional anisotropy in a ferromagnet - antiferromagnet bilayer by keV-He ion bombardment — •D. Engel1, A. Ehresmann1, J. Schmalhorst2, M. Sacher2, V. Höink2, and G. Reiss2 — 1Fachbereich Physik, Technische Universität Kaiserslautern, D-67663 Kaiserslautern, Germany — 2Fakultät für Physik, Universität Bielefeld, D-33501 Bielefeld, Germany
A polycrystalline Cu/Ni80Fe20/Mn83Ir17/Co/AlOx ferromagnet-antiferromagnet layer system was grown without applying an external magnetic field showing no unidirectional anisotropy in the as prepared state. After 10-keV He-ion bombardment in an external in-plane magnetic field a clear unidirectional anisotropy collinear to the magnetic field direction during bombardment is observed, indicating that ion bombardment can be used for this system to initialize the unidirectional exchange anisotropy. The magnetization reversal processes for various ion doses are discussed, based on longitudinal Magnetooptical Kerr-Effect measurements.