Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 15: Magnetism Poster A
MA 15.78: Poster
Dienstag, 2. April 2019, 10:00–13:00, Poster E
Magnetic and structural properties of MBE grown Fe/Gd films on W(110) investigated with XRR and XMCD-R — •Dominic Lawrenz1, Wibke Bronsch1, Markus Gleich1, Xinwei Zheng1, Abdallah Elkalash1, Christian Schüssler-Langeheine2, Emmanuelle Jal3, 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 — 3Laboratoire de Chimie Physique-Matiere et Rayonnement, 4 place Jussieu, 75252 Paris Cedex 05
We studied bilayers of Fe/Gd on W(110) grown via molecular beam epitaxy (MBE). Thickness as well as roughness of the overall film and its constituent layers can be determined from an analysis of X-ray reflectrometry (XRR) measurements. Employing the dichroic response of the Fe L3 and the Gd M5 edges measured with XMCD in reflection, we examined the temperature-dependent magnetization of the bilayer element specifically. Our results show a ferrimagnetic coupling between the Fe and Gd layers in agreement with previous investigations [1]. Close to room temperature we observe that both layers first demagnetize and at slightly higher temperatures remagnetize in the opposite direction. This is very promising as it hints at the possibility of single shot all-optical switching of such layers with short laser pulses, shown for FeGd alloys before [2].
[1] Haskel et al., Phys. Rev. Lett. 87, 207201 (2001)
[2] Stanciu et al., Phys. Rev. Lett. 99, 047601 (2007)