Regensburg 2007 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Magnetic Thin Films II
MA 20.7: Vortrag
Mittwoch, 28. März 2007, 16:45–17:00, H5
Magneto-optics in the vicinity of the M2,3 and L2,3 edges of iron — •Armin Kleibert1, Joachim Bansmann2, Ponpandian Nagamony1, and Karl-Heinz Meiwes-Broer1 — 1Institut für Physik, Universität Rostock, Universitätsplatz 3, D-18051 Rostock — 2Institut für Oberflächenkatalyse, Universität Ulm, D-89069 Ulm
Soft x-ray and EUV based experimental techniques are powerful and very sensitive methods in order to investigate the properties of systems with low dimensions such as ultrathin films or clusters. In particular magnetic linear and circular dichroism effects in the vicinity of element-specific resonances have attracted much attention. While respective absorption experiments are frequently applied in order to study the properties of magnetic nanostructures reflectivity-based techniques are still comparably rare to find. However, the reflectivity as well as the absorption properties of a material are determined by one dielectric tensor and thus yield the same information. In this contribution, we present the full dielectric tensor of iron in the vicinity of the M2,3 as well as the L2,3 edges obtained from absorption experiments as well as from reflectivity data. The data are then used in order to simulate magneto-optical effects occuring in absorption, transmission as well as in reflection of polarized radiation in both energy ranges. Characteristic properties are discussed for some practically relevant situations in respective experiments.