Berlin 2012 – scientific programme
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MA: Fachverband Magnetismus
MA 52: Poster II - Magnetic Heusler compounds, Magnetic shape memory alloys, Thin Films, Micro-/Nano-structured magnetic materials, Graphene, Spins in organics, Magnetic imaging, Surface Magnetism, Spin excitations/Torque, Spincaloric transport
MA 52.46: Poster
Friday, March 30, 2012, 11:00–14:00, Poster A
Magnetic resonant scattering with Laser generated higher harmonic radiation — •Christian Weier1, Dennis Rudolf1, Roman Adam1, Claus M. Schneider1, André Kobs2, Gerrit Winkler2, Robert Frömter2, Hans P. Oepen2, Margaret M. Murnane3, and Henry C. Kapteyn3 — 1Peter Grünberg Institut, Research Center Jülich, 52425, Jülich, Germany — 2Institut für Angewandte Physik, University of Hamburg, 20355, Hamburg, Germany — 3JILA, University of Colorado, Boulder, CO 80309-0440, USA
Laser driven higher harmonic generation has recently been used to generate extreme ultraviolet (EUV) radiation for probing magnetization dynamics of ferromagnets, element selectively, with a time resolution of few femtoseconds. EUV photons with energies of 52 eV, 61 eV and 67 eV can reach M-absorption edges of Fe, Co and Ni, respectively, what leads to a resonantly enhanced magneto-optical signal. On the other hand, there is a strong progress in imaging techniques using laser generated EUV radiation due to its low divergence and high coherence. In our experiment, we resonantly scatter EUV light from Co/Pt-multilayers forming a magnetic domain pattern. As a consequence of the magnetization dependent scattering, the amplitude of the resulting image in k-space is directly related to the average domain size. Exploring advantage of the femtosecond coherent EUV radiation, our scattering experiment gives the possibility to probe magnetization dynamics with a high temporal and spatial resolution.