1. Institute of Advanced Ceramics, Hamburg University of Technology, D-21073 Hamburg, Germany
2. MagIC—Magnesium Innovation Centre, Helmholtz-Zentrum Geesthacht, D-21502 Geesthacht, Germany
3. Deutsches Elektronen-Synchrotron (DESY), D-22607 Hamburg, Germany
4. Department Physik, Universität Hamburg, D-20355 Hamburg, Germany
5. Institute of Functional Interfaces, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany