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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. Kapteyn31Peter 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.

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