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.