Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.19: Poster
Dienstag, 1. April 2014, 13:00–15:30, P1
Element-selective magneto-optics employing circularly polarized EUV radiation from a tabletop plasma EUV source — •Daniel Wilson1,2,4, Denis Rudolf1,2,4, Roman Adam3,4, Serhiy Danylyuk4,5, Claus M. Schneider3,4, Detlev Grützmacher2,4, and Larissa Juschkin1,2,4 — 1RWTH Aachen University, Experimental Physics of EUV, Steinbachstrasse 15, 52074 Aachen, Germany — 2Peter Grünberg Institut (PGI-9), Research Centre Jülich GmbH, 52425 Jülich, Germany — 3Peter Grünberg Institut (PGI-6), Research Centre Jülich GmbH, 52425 Jülich, Germany — 4JARA - Fundamentals of Future Information Technology — 5RWTH Aachen University, Chair for Technology of Optical Systems, Steinbachstrasse 15, 52074 Aachen, Germany
Magneto-optical methods using visible light are able to detect a small magnetization, but they hardly can be applied for element-selective studies. On the other hand, if the wavelength of light matches an atomic absorption edge, the measurement becomes element- and thus layer-selective. The M2,3 absorption edges of the technologically important ferromagnetic elements Fe, Co and Ni are located in the extreme ultraviolet (EUV) spectral region. In our work, we generate circularly polarized light at 54 eV, 60 eV and 67 eV corresponding to the M2,3 absorption edges of Fe, Co and Ni from an intense, laboratory-based gas discharge plasma EUV source. In addition, we developed an ellipsometer consisting of a linear multilayer polarizer, a circular triple reflection polarizer and an analyzer, allowing us to perform x-ray magnetic circular dichroism measurements.