Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 48: Poster Session II
MA 48.24: Poster
Donnerstag, 10. März 2016, 15:00–18:00, Poster B1
Element-selective investigation of the spin dynamics in NixPd1-x magnetic alloys in the extreme ultraviolet spectral range — •Seung-gi Gang1, Roman Adam1, Christian Weier1, Moritz von Witzleben1, Moritz Plötzing1, Oliver Schmitt4, Henry C. Kapteyn2, Margaret M. Murnane2, Pablo Maldonado3, Stefan Mathias5, Martin Aeschlimann4, Peter M. Oppeneer3, and Claus M. Schneider1 — 1Peter Grünberg Institut PGI-6, Research Centre Jülich, 52425 Jülich, Germany — 2Department of Physics and JILA, University of Colorado, Boulder, CO 80309-0440, USA — 3Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden — 4University of Kaiserslautern and OPTIMAS, 67663 Kaiserslautern, Germany — 5University of Göttingen, 37077 Göttingen, Germany
Optical pump-probe experiments allow the investigation of spin dynamics in magnetic materials on femtosecond time scales. Alloying 4d non-magnetic and 3d magnetic transition metals is expected to improve our understanding of the exchange interaction. We studied the ultrafast demagnetization of NixPd1-x alloys with varying x element selectively using a laser-based extreme ultraviolet light source. The spin-orbit coupling was further tuned with mixing ratio to study its influence. Transversal MOKE results measured for the Ni subsystem display an opposite quenching dependence on the stoichiometry compared to longitudinal MOKE probing the integrated response of both materials. Further experiments addressing the Pd subsystem are expected to clarify the role of the Pd, as a possible spin reservoir.