Ultrafast Dynamics of choral spin structures in magnetic multilayer systems

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The aim of this project is to study the ultrafast chiral dynamics by employing time-resolved X-ray resonant magnetic scattering methods using both X-ray free-electron laser sources and sources based on higher harmonic generation in the laboratory. We propose to employ IR and X-ray excitation of different magnetic systems display chiral magnetic order and to probe the temporal evolution of the chiral and collinear magnetic order parameters Since the characteristic timescale for the onset of the chiral magnetic order and its ultrafast dynamics are unexplored up to now, we need to ascertain both, as they hold fundamental insights into the underlying physical mechanisms and allow us to gauge the ultimate speed for the manipulation of chiral magnetism, e.g., for ultrafast writing of chiral spin textures. We propose to investigate the following aspects to understand ultrafast dynamics of chiral magnetism in multilayer systems: (i) the role of size and sign of the Dzyaloshinskii-Moriya interaction in ferromagnetic systems and (ii) static and dynamic properties of chiral topological objects such as skyrmions.