Regensburg 2004 – wissenschaftliches Programm
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MA: Magnetismus
MA 13: Poster:Schichten(1-23),Spinabh.Trsp(24-41),Exch.Bias(42-56),Spindyn.(57-67),Mikromag.(68-76),Partikel(77-90),Spinelektr.(91-97),Elektr.Theo.(98-99),Mikromag+PhasÜ+Aniso.(100-105),Magn.Mat.(106-118),Messmethod.(119-121),Obflm.+Abbverf.(122-123)
MA 13.85: Poster
Dienstag, 9. März 2004, 15:00–19:00, Bereich A
Resonant Soft X-Ray Scattering from Magnetic Nanoparticles — •E. Schierle1, E. Weschke1, Holger Ott1, C. Schüßler-Langeheine1,2, G. Kaindl1, J.-M. Tonnère3, C. Meyer3, B. Stahlmecke4, and G. Dumpich4 — 1Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany — 2II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany — 3Laboratoire Louis Néel, CNRS, BP 166, 38042 Grenoble cedex 9, France — 4Experimentalphysik Arbeitsgruppe Farle, Fakultät für Naturwissenschaften, Institut für Physik, Universität Duisburg-Essen Campus Duisburg, Lotharstr. 1, 47057 Duisburg
The application of magnetic nanoparticle arrays as data storage media requires independently addressable non-interacting dots. A characterization of such arrays in terms of spatial and magnetic correlations is therefore important, which can be obtained by scattering techniques. Particularly useful in this respect is resonant scattering in the soft x-ray region, i.e., at the L2,3 edges of the 3d transition metals and at the M4,5 edges of the lanthanide metals. At these photon energies, the wavelengths nicely match the distances in these systems and the resonances provide very high sensitivity to the specific nanoparticle. Furthermore, the magnetic part of the resonant scattering amplitude allows to study magnetic correlations. First results from monocrystalline Tb nanoparticles and from well-ordered arrays of CoPt multilayer dots are discussed. The setup of a new UHV-compatible x-ray diffractometer will be presented, which also allows in-situ preparation under UHV conditions. This work was supported by the BMBF, project 05 KS1KEE/8.