Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 27: Ultrafast Magnetization Effects I
MA 27.3: Talk
Wednesday, March 11, 2026, 10:15–10:30, HSZ/0004
Time-resolved coherent small-angle EUV scattering of magnetic thin film structures — •Konstanze Korell1, Sergey Zayko1, Hung-Tzu Chang1, Timo Schmidt2, Murat Sivis1,3, Manfred Albrecht2, and Claus Ropers1,3 — 1Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany — 2Experimental Physics IV, University of Augsburg, Germany — 34th Physical Institute - Solids and Nanostructures, University of Göttingen, Germany
Laser excitation yields control over magnetic structures on the femtosecond timescale, yet the corresponding nanoscale response remains difficult to access. Ultrafast coherent diffractive imaging has recently provided real-space insights [1], limited, however, to reversible dynamics. Here, by carrying out coherent speckle diffraction, we combine the strengths of diffraction with the coherence of a source capable of coherent imaging. Through this, we get insights to reversible and irreversible processes. Using a femtosecond high harmonic generation source, we measure pump-probe scattering from magnetic thin films in a laboratory-based setup. We discuss both the opportunities and limitations of this approach providing a basis for the interpretation of nanoscale magnetic dynamics in future ultrafast experiments.
[1] H.-T. Chang et. al, arXiv:2504.17917 (2025)
Keywords: small-angle scattering; high harmonic generation; EUV; ultrafast dynamics; magnetic domains