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O: Fachverband Oberflächenphysik
O 64: Surface Magnetism
O 64.8: Talk
Wednesday, March 11, 2026, 17:15–17:30, HSZ/0403
Influence of the light polarization on magnetic dichroism in threshold photoemission — •Frank O. Schumann1 and Jürgen Henk2 — 1Max-Planck Institut für Mikrostrukturphysik, Halle, Germany — 2Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Germany
Incoming normal incidence light which is neither purely s- or p-polarized will become in general elliptically polarized inside a metallic surface. We ask how the magnetic dichroism is affected if the incoming light is changed from circularly to linearly polarized, with equally large s- and p-components. This is further compared if the incoming elliptically polarized light is tuned such that it becomes circularly polarized inside the surface. Initial theoretical work on normal emission demonstrated for in-plane magnetized samples a sizeable difference in the dichroism spectra for different light polarizations.[1]
We performed an one-step photoemission calculation for threshold photoemission from a Fe(100) and capture the emission into the full half sphere. The photon energy was 5.2 eV and the angle of incidence was set to 65∘ as realized in PEEM instruments. We are interested in domain imaging and we determine the relevant asymmetry for magnetic domains.[2] The spectra for a given magnetization direction and polarization state are very different whereas the magnetic dichroism signal displays a weak dependence.
Keywords: photoemission; magnetic domains