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AM: Magnetismus

AM 14: Dünne Schichten II

AM 14.13: Talk

Thursday, March 29, 2001, 18:00–18:15, S 5.2

Magnetooptical response from Fe microstructures — •Till Schmitte, Safak Goek, Oliver Schwöbken, Kurt Westerholt, and Hartmut Zabel — Institut für Experimentalphysik IV, Ruhr-Universität Bochum, 44780 Bochum

Microstructured ferromagnetic thin film systems exhibit interesting magnetooptical properties. We compare the magnetooptical response (longitudinal Kerr effect) at interference spots of polycrystalline and single crystal Fe stripes. Width and separation of the stripes vary in the range of a few micrometers, their thickness is approx. 30 nm. Laser light scattered by these samples show diffraction patterns and the MOKE signal at off-specular reflection (Bragg-MOKE) is modulated due to interference effects. Regular domain patterns of such stripes result in characteristic modifications of the Bragg-MOKE hysteresis loops. This technique might be a reciprocal complement to real space observation via Kerr microscopy and MFM.
Supported by SFB 491: Magnetic Heterostructures