1. Nanoscale Engineering Division, Department of Physics, Chemistry, and Biology (IFM), Linköping University, SE-58183 Linköping, Sweden
2. Thin Film Physics Division, Department of Physics, Chemistry, and Biology (IFM), Linköping University, SE-58183 Linköping, Sweden
3. Max-Planck-Institut für Eisenforschung GmbH, D-40237 Düsseldorf, Germany