X-ray Snapshots of Magnets and Liquids Using X-ray Free-Electron Lasers
X-ray free-electron laser sources provide extremely high-intensity and ultashort X-ray pulses which allow to access ultrafast phenomena in condensed matter on the nanoscale. In this talk I will report on results and future challenges of resonant magnetic scattering experiments using the FEL sources FLASH, LCLS and FERMI [1-3]. We investigated via IR pump / FEL probe experiments the ultrafast response of magnetic domain configurations in Co/Pt multilayer systems  to an optical pump-laser pulse.
First single-shot holography experiments have been performed at LCLS demonstrating the feasibility of imaging magnetic domains with fs X-ray pulses . Further experiments focused on speckle correlations from disordered systems such as colloidal and atomic liquids. First results from hard X-ray scattering experiments will be presented  and future possibilities will be discussed.
 C. Gutt et al. Phys. Rev. B. 79, 212406 (2009).
 C. Gutt et al. Phys. Rev. B 81, 100401 (R) (2010).
 T. Wang et al. Phys. Rev. Lett. 108, 267403 (2012).
 B. Pfau et al. Nature Communications 3, 1100 (2012).
 C. Gutt et al. Phys. Rev. Lett 108, 024801 (2012).