Institution: | (1) Federal Institute of Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin, Germany;(2) Department of Physics, University of Rostock, Universitätsplatz 3, D-18051 Rostock, Germany;(3) Institute Max von Laue-Paul Langevin 6, rue Jules Horowitz, B.P. 156, F-38042 Grenoble Cedex 9, France;(4) Research Center Jülich, Institute for Solid State Research, D-52425 Jülich, Germany |