SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 40: Poster Magnetism II
MA 40.39: Poster
Donnerstag, 30. März 2023, 14:00–16:00, P2/EG
Pulse-triggered detection of resonant magnetic small-angle scattering at a laser-driven X-ray source — •Leonid Lunin1, Martin Borchert1, Daniel Schick1, Bastian Pfau1, and Stefan Eisebitt1,2 — 1Max-Born-Institut, Berlin, Germany — 2Technische Universität, Berlin, Germany
Resonant soft-x-ray scattering methods provide unique possibilities to study nanometer-scale magnetization dynamics on ultrashort timescales. Typically, these experiments are performed at synchrotron-radiation (SR) sources or x-ray free-electron lasers (XFELs) due to the required tunability and intensity of the radiation. While XFELs still offer only limited access, the available time resolution at SR sources on the order of 100 ps is insufficient for many phenomena in ultrafast magnetism. We developed an instrument based on a laser-driven plasma x-ray source to perform resonant x-ray scattering in the wavelength regime between 50 eV and 1500 eV with pulses of 10 ps duration. Specifically, we here present the first resonant small-angle x-ray scattering experiment on a laboratory scale with photon energies in the range of the transition-metal L edges and the rare-earth-metal M edges. In our pilot experiment, we detect scattering from domains forming in a ferrimagnetic Fe/Gd multilayer using an electronically triggered hybrid detector with single-photon sensitivity. Such laboratory-based measurements will allow studying magnetization dynamics with high spatio-temporal resolution in a much more efficient and flexible way than possible today.