1. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131, Karlsruhe, Germany
2. CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France
3. Université de Bordeaux, UPR 8641, Pessac, F-33600, France
4. Institute of Nanotechnology, Karlsruhe Institute of Technology, Postfach 3640, D-76021 Karlsruhe, Germany
5. Institut Néel − CNRS, BP 166, 25 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
6. Institut für Synchrotronstrahlung, Karlsruhe Insitute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany