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MA: Fachverband Magnetismus
MA 57: Posters Magnetism II
MA 57.20: Poster
Donnerstag, 19. März 2020, 15:00–18:00, P3
Static and dynamic demagnetization of MBE grown Fe/Gd films on W(110) investigated with XMCD-R — •Dominic Lawrenz1, Jonathan Weber1, Wibke Bronsch1, Tim Amrhein1, Jan Böhnke1, Rinat Khanbekov1, Sarah Krüger1, Huijuan Xiao1, Markus Gleich1, Kamil Bobowski1, Xinwei Zheng1, Niko Pontius2, Christian Schüssler-Langeheine2, Torsten Kachel2, Nele Thielemann-Kühn1, and Martin Weinelt1 — 1Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin — 2Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin
Bilayers of ferrimagnetic Fe/Gd on W(110) were investigated at BESSY II. We examined the temperature-dependent magnetization of the bilayer element-specifically by measuring the Fe L3,2- and the Gd M5,4-edges using XMCD in reflection. We show that thermal magnetization-switching is dependent on the layer thickness. Further time-resolved experiments at the FEMTOSPEX facility show ultrafast demagnetization dynamics on a sub-ps timescale even for Gd, much faster than previously observed for pure Gd films. We attribute this to efficient interlayer spin currents.