Regensburg 2007 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Spin-Dynamics/Switching I

MA 19.15: Vortrag

Mittwoch, 28. März 2007, 18:45–19:00, H23

Time-, Spin- and Energyresolved photoemission microscopy of 3d transition metals — •Bernd Heitkamp, H. A. Dürr, and W. Eberhardt — Albert-Einstein-Strasse 15, 12489 Berlin

Understanding ultrafast de- and remagnetization processes are of considerable interest, since it allows to shorten the read/write-cycles in magnetism based memories.

Our approach is to combine the nm-spatial resolution of a photoelectron emission microscopy (PEEM) with a fs time-resolution using the pump-probe technique. Magnetic sensitivity is obtained by detecting the spin of the emitted photoelectrons.

Experiments on Nickel and Cobalt show a demagnetization below one picosecond. Electron- and Spindynamics strongly depend on the dielectric response of the nanostructures.