Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Poster Session II

MA 48.56: Poster

Donnerstag, 10. März 2016, 15:00–18:00, Poster B1

X-Ray Magnetic Circular Dichroism Measurements in doped Gadolinium Iron Garnet — •Kathrin Ganzhorn^1,2, Stephan Gepraegs¹, Matthias Opel¹, Andre Rogalev³, Fabrice Wilhelm³, Katharina Ollefs^3,4, Francois Guillou³, Rudolf Gross^1,2,5, and Sebastian T. B. Goennenwein^1,2,5 — ¹Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — ²Physik-Department, Technische Universität München, 85748 Garching, Germany — ³European Synchrotron Radiation Facility (ESRF), 38043 Grenoble Cedex 9, France — ⁴Fakultät für Physik, Universität Duisburg-Essen, 47057 Duisburg, Germany — ⁵Nanosystems Initiative Munich (NIM), 80799 München Germany

Magnetically compensated rare earth garnets, such as Gadolinium Iron Garnet (Gd₃Fe₅O₁₂, GdIG), exhibit a pronounced temperature and magnetic field dependence of the sublattice magnetizations. In particular, the Fe and Gd sublattices can switch from a collinear to a canted configuration, resulting in a complex magnetic phase diagram. In order to determine the sublattice magnetization orientations in GdIG thin films, we performed x-ray magnetic circular dichroism (XMCD) on the Gd-L3 and Fe-K edge as a function of temperature and magnetic field. We compare the magnetic phase diagram obtained from these measurements with calculations based on a mean field model and find good agreement.

Financial support by DFG via SPP 1538 is gratefully acknowledged.