Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.28: Poster
Dienstag, 1. April 2014, 13:00–15:30, P1
Element-selective investigation of magnetic domain structure in CoPd and FePd alloys using small-angle soft X-ray scattering. — Christian Weier1, •Roman Adam1, Robert Frömter2, Judith Bach2, Björn Beyersdorff2, Kai Bagschik2, Hans Peter Oepen2, Leonard Müller3, Stefan Schleitzer3, Magnus Berntsen3, Gerhard Grübel3, and Claus Michael Schneider1 — 1Peter Grünberg Institut, PGI-6 & JARA-FIT, Forschungszentrum Jülich, 52425, Jülich, Germany — 2Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, 20355, Hamburg, Germany — 3Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
Recent optical pump-probe experiments on magnetic multilayers and alloys identified perpendicular spin superdiffusion as one of the possible mechanisms responsible for femtosecond magnetization dynamics. On the other hand, ultrafast lateral spin transport needs to be further understood in detail. To address this question, we studied the magnetic domain structure of CoPd and FePd thin films using small-angle scattering of soft X-rays. Applying in-situ magnetic fields resulted in pronounced rearrangement of domain structure that was clearly observed in scattering images. Our analysis of both the stand-alone, as well as magnetically coupled CoPd/FePd layers provides insight into the formation of domains under small magnetic field perturbations and paves the way to better understanding of transient changes expected in magneto-dynamic measurements.