Author: Müller, L.
Paper Title Page
THA04 Ultrafast Magnetisation Dynamics at the Low-Fluence Limit Supported by External Magnetic Fields 574
  • M. Riepp, K. Bagschik, T. Golz, G. Grübel, L. Müller, A. Philippi-Kobs, W.R. Roseker, R. Rysov, N. Stojanovic, M. Walther
    DESY, Hamburg, Germany
  • F. Capotondi, M. Kiskinova, D. Naumenko, E. Pedersoli
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • R. Frömter, H.P. Oepen
    University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany
  We report on ultrafast magnetisation dynamics in ferro-magnetic 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.  
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About • paper received ※ 19 August 2019       paper accepted ※ 19 September 2019       issue date ※ 05 November 2019  
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