Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.15: Poster
Monday, March 9, 2026, 09:30–12:30, P2
Development of a Laboratory Soft X-Ray Reflectometer for Ultrafast Magnetisation Studies — •Pierre Gautier1, Clemens von Korff Schmising1, and Stefan Eisebitt1,2 — 1Max Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Berlin, Germany — 2Technische Universität Berlin, Institut für Optik und Atomare Physik, Berlin, Germany
Ultrafast spectroscopy in the extreme ultraviolet (XUV) range is a powerful experimental tool for investigating ultrafast magnetisation dynamics, providing element-specific information and access to the non-equilibrium electronic density of states. Using reflection geometry, experimental observables also allow direct access to depth-dependent dynamics. In this study, we present the initial findings from a recently developed experimental setup optimised for broadband reflectometry of magnetic materials. Soft X-ray radiation is generated through highharmonic generation using 100 kHz, sub-10 femtosecond laser pulses produced by a fibre laser with a two-stage pulse compression scheme. A high-resolution spectrometer optimised for photon energies between 45 eV and 180 eV is mounted on a goniometer arm, allowing access to angles of incidence ranging from θ=0∘ to 80∘. The goal of this research is to resolve the ultrafast dynamics of spatial magnetisation profiles, spin currents, and spin accumulation within functional heterostructures.
Keywords: Reflectometer; Soft X-ray; HHG; Experimental Setup