Berlin 2005 – wissenschaftliches Programm

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MA: Magnetismus

MA 32: Mikro- und nanostrukturierte magn. Materialien II

MA 32.8: Vortrag

Mittwoch, 9. März 2005, 12:45–13:00, TU H1028

Shining light on magnetic microstructures — •Arndt Remhof, Cengiz Bircan, Andreas Westphalen, Johannes Grabis, Alexei Nefedov, and Hartmut Zabel — Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum

The increasing interest in micro- and nanomagnetism requires new instruments to examine the collective behavior of laterally structured ferromagnetic thin films. We demonstrate the possibility to extend the established Bragg-MOKE technique, which measures the Kerr effect on off-specular diffracted polarized laser light to soft x-rays. The shorter wavelength, which allows to investigate smaller structures, and the element selectivity of the resonant scattering make soft x-rays an attractive tool to study patterned ferromagnetic heterostructures. We illustrate this technique on permalloy islands and on exchange biased iron islands on CoO as two model systems. The results so far are in agreement with other experimental techniques and show the feasibility of off-specular resonant magnetic soft x-ray scattering. This work was founded by SFB491 and by the BMBF under contract 03ZAE8BO.