Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 36: Magnetic Measurement Techniques
MA 36.6: Vortrag
Donnerstag, 14. März 2013, 11:00–11:15, H3
Resonant magnetic scattering at magnetic domains in Co/Pt multilayers using laser-generated XUV light — •Christian Weier1,2, Roman Adam1,2, Dennis Rudolf1,2, Patrik Grychtol4, André Kobs3, Gerrit Winkler3, Robert Frömter3, Hans Peter Oepen3, Margaret M. Murnane4, Henry C. Kapteyn4, and Claus M. Schneider1,2 — 1Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, 52425, Jülich, Germany — 2JARA, Fundamentals of Future Information Technology — 3Institut für Angewandte Physik, University of Hamburg, 20355, Hamburg, Germany — 4Department of Physics and JILA, University of Colorado, Boulder, CO 80309-0440, USA
Laser-driven higher-harmonic generation (HHG) has recently been used for element-selective probing of magnetization dynamics in ferromagnets with a femtosecond temporal resolution. Tuning the energy of the probe beam to the M-absorption edges of Fe, Co and Ni located at 52 eV, 61 eV and 67 eV results in a resonant enhancement of the magneto-optic signal. On the other hand, the corresponding wavelength of approximately 20 nm from this tabletop source gives access to a variety of imaging techniques with unique features that are characteristic for a laser source, namely, a low divergence, high coherence and a high temporal resolution. In our small-angle resonant magnetic scattering experiment we employ laser-generated XUV radiation for investigations of Co/Pt-multilayers containing a magnetic, out-of-plane domain pattern. The resulting image in k-space is directly related to the average domain size in the multilayer of approximately 100 nm.