Dresden 2009 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Magnetic Thin Films II
MA 23.7: Vortrag
Mittwoch, 25. März 2009, 16:15–16:30, HSZ 04
Ion Irradiation Induced Modification of Magnetic Properties in Py-Ta-Multilayers — •Daniel Markó1, Thomas Strache1, Kilian Lenz1, Jürgen Faßbender1, and Rainer Kaltofen2 — 1Forschungszentrum Dresden-Rossendorf e.V., Institut für Ionenstrahlphysik und Materialforschung, Abteilung Nanofunktions-schichten Bautzner Landstr. 128, D-01328 Dresden, Germany — 2IFW Dresden, Institut für Integrative Nanowissenschaften, Helmholtzstr. 20, D-01069 Dresden, Germany
We have investigated Py-Ta thin film systems with varying numbers of interfaces, but a constant overall thickness of 20 nm Py and 35 nm Ta. The samples have been irradiated with Ne+ ions at various fluences in order to modify their magnetic properties, that have been probed using ferromagnetic resonance (FMR), magneto-optical Kerr effect (MOKE), and SQUID magnetometry. The saturation magnetization Ms decreases both with increasing number of Py-Ta inferfaces and with increasing ion fluences. The uniaxial anisotropy of the samples is only of small magnitude and remains almost unaffected. There is a critical fluence depending on the number of interfaces for which ferromagnetism vanishes.