Ultrafast magnetisation dynamics at the low-fluence limit supported by external magnetic fields

M. Riepp*, L. Müller, A. Philippi-Kobs, W. Roseker, R. Rysov, K. Bagschik, M. Walther, T. Golz, N. Stojanovic, G. Grübel, R. Frömter, H. P. Oepen, D. Naumenko, E. Pedersoli, F. Capotondi, M. Kiskinova

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


    We report on ultrafast magnetisation dynamics in ferromagnetic cobalt/platinum multilayers upon pumping by near and mid to far infrared radiation, utilizing sub-100 femtosecond free-electron laser pulses. The evolution of the excited magnetic state is studied on femtosecond timescales with nanometre spatial resolution and element selectivity, employing time-resolved magnetic small-angle X-ray scattering. The obtained results contribute to the ongoing discussion to what extent either coupling of the electromagnetic field or rather quasi-instantaneous heating of the electron-system is the driving force for phenomena like ultrafast demagnetization or all-optical helicity-dependent switching.

    Original languageEnglish
    Title of host publicationProceedings of the 39th International Free-Electron Laser Conference, FEL 2019
    PublisherJACoW Publishing
    Number of pages4
    ISBN (Electronic)9783954502103
    Publication statusPublished - 1 Jan 2019
    Event39th International Free-Electron Laser Conference, FEL 2019 - Hamburg, Germany
    Duration: 26 Aug 201930 Aug 2019

    Publication series

    NameProceedings of the 39th International Free-Electron Laser Conference, FEL 2019


    Conference39th International Free-Electron Laser Conference, FEL 2019

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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