Journal Article

FZJ-2021-03898

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Laser-driven resonant magnetic soft-x-ray scattering for probing ultrafast antiferromagnetic and structural dynamics

Schick, D. (Corresponding author) ; Borchert, M. ; Braenzel, J. ; Stiel, H. ; Tümmler, J. ; Bürgler, D. E.FZJ* ; Firsov, A. ; von Korff Schmising, C. ; Pfau, B. ; Eisebitt, S.

2021
OSA Washington, DC

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Please use a persistent id in citations: doi:10.1364/OPTICA.435522

Abstract: Time-resolved resonant magnetic scattering in the soft-x-ray range is a powerful tool for accessing the spatially resolved and element-specific spin dynamics in magnetic materials. So far, the application of this photon-demanding technique was limited to large-scale facilities. However, upgrades to diffraction-limited storage rings supporting only x-ray pulses beyond 100 ps, and the shift of x-ray free-electron lasers toward attosecond pulses aggravate the competition for beamtime in the picosecond time window, which is of utmost relevance for magnetism research. Here we present the development of a lab-based instrument providing sufficient photon flux up to 1.5 keV photon energy covering the soft-x-ray resonances of transition and rare-earth metal atoms. Our setup features the mandatory tunability in energy and reciprocal space in combination with sub-10 ps temporal resolution, exploiting the broadband emission of a laser-driven plasma x-ray source, which is monochromatized to about 1 eV bandwidth by a reflection zone plate. We benchmark our approach against accelerator-based soft-x-ray sources by simultaneously probing the laser-induced magnetic and structural dynamics from an antiferromagnetically coupled Fe/Cr superlattice. Our development lays the foundation for laser-driven resonant scattering experiments to study ultrafast ordering phenomena of charges, spins, and orbitals.

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Contributing Institute(s):

1. Elektronische Eigenschaften (PGI-6)

Research Program(s):

1. 5214 - Quantum State Preparation and Control (POF4-521) (POF4-521)

Appears in the scientific report 2021

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