1. TU Dortmund University Experimental Physics VI 44227 Dortmund Germany
2. Peter Grünberg Institute (PGI‐6) Jülich Research Centre 52425 Jülich Germany
3. Institute of Physics, University of Graz Karl‐Franzens‐Universität Graz Graz 8010 Austria
4. Swiss Light Source Paul Scherrer Institute Villigen CH‐5232 Switzerland
5. CNR‐IOM TASC Laboratory Trieste 34149 Italy
6. Department of Physics University of Trieste Trieste 34127 Italy
7. Department of Chemical and Pharmaceutical Sciences University of Trieste Trieste 34127 Italy
8. Interface Research and Catalysis Erlangen Center for Interface Research and Catalysis Friedrich‐Alexander University Erlangen‐Nuremberg 91058 Erlangen Germany
9. Faculty of Physics and Center for Nanointegration Duisburg‐Essen (CENIDE) University of Duisburg‐Essen 47048 Duisburg Germany