Dresden 2009 – scientific programme

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MA: Fachverband Magnetismus

MA 8: Magnetic Coupling Phenomena / Exchange Bias

MA 8.10: Talk

Monday, March 23, 2009, 17:30–17:45, HSZ 401

Influence of Rippled Substrate Morphology on the Interlayer Exchange Coupling in Fe/Cr/Fe Thin Films — •Michael Körner, Maciej Oskar Liedke, Thomas Strache, Siarhei Dzenisevich, Adrian Keller, Stefan Facsko, and Jürgen Fassbender — Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, 01314 Dresden, Germany

We have investigated the interlayer exchange coupling in Fe (4 nm)/Cr (x nm)/Fe (4 nm) thin film trilayers (x=0–5 nm) deposited on rippled armorphous silicon substrates. The substrate surface was periodically modulated (periods of 20 nm, 35 nm, and 50 nm) by Ar⁺ ion erosion. The influence of the resulting surface and interface structure on the magnetic properties has been investigated by magneto-optical Kerr effect (MOKE). We found an orange peel type coupling, predicted by Néel’s theory and, due to the morphology of the magnetic layers, a strong uniaxial magnetic anisotropy in the system.

This work is supported by DFG grant FA 314/6-1.