Wang, T.; Zhu, D.; Wu, B.; Graves, C.; Schaffert, S.; Rander, T.; Müller, L.; Vodungbo, B.; Baumier, C.; Bernstein, D.P.; Bräuer, B.; Cros, V.; de Jong, S.; Delaunay, R.; Fognini, A.; Kukreja, R.; Lee, S.; Lopez-Flores, V.; Mohanty, J.; Pfau, B.; Popescu, H.; Sacchi, M.; Sardinha, A.B.; Sirotti, F.; Zeitoun, P.; Messerschmidt, M.; Turner, J.J.; Schlotter, W.F.; Hellwig, O.; Mattana, R.; Jaouen, N.; Fortuna, F.; Acremann, Y.; Gutt, C.; Duerr, H.; Beaurepaire, E.; Boeglin, C.; Eisebitt, S.; Grübel, G.; Lüning, J.; Stöhr, Joachim; Scherz, A.O.: Femtosecond Single-Shot Imaging of Nanoscale Ferromagnetic Order in Co/Pd Multilayers Using Resonant X-Ray Holography. Physical Review Letters 108 (2012), p. 267403/1-6
10.1103/PhysRevLett.108.267403
Open Access Version
Abstract:
We present the first single-shot images of ferromagnetic, nanoscale spin order taken with femtosecond x-ray pulses. X-ray-induced electron and spin dynamics can be outrun with pulses shorter than 80 fs in the investigated fluence regime, and no permanent aftereffects in the samples are observed below a fluence of 25 mJ/cm^2. Employing resonant spatially muliplexed x-ray holography results in a low imaging threshold of 5 mJ/cm^2. Our results open new ways to combine ultrafast laser spectroscopy with sequential snapshot imaging on a single sample, generating a movie of excited state dynamics.