Affiliation: | (1) Institut für Experimentelle Physik Abteilung Materialphysik, Otto-von-Guericke-Universität Magdeburg, PF 4120, D-39016 Magdeburg, Germany;(2) School of Metallurgy and Materials, The University of Birmingham, Edgbaston, B 15 2TT Birmingham, U.K. |