1. Institute
of Physical and Theoretical Chemistry, University of Bonn, Wegelerstraße
12, D-53115 Bonn, Germany
2. Institute
of Functional Interfaces, Karlsruhe Institute of Technology, D-76021 Karlsruhe, Germany
3. Peter
Grünberg Institute, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, D-52425 Jülich, Germany
4. Institut
de Chimie Moléculaire et des Matériaux d’Orsay, Université Paris Sud, UMR 8182, F-91405 Orsay Cedex, France
5. Centre
Interdisciplinaire de Nanoscience de Marseille, Aix-Marseille Université, UMR 7325, Campus de Luminy, Case 913, F-13288 Marseille Cedex 09, France
6. Institute
of Experimental Physics, University of Wroclaw, Pl. Maksa Borna, 50-204 Wroclaw, Poland