1. Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
2. Peter Grünberg Institute (PGI-6/7), JARA-FIT, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52425 Jülich, Germany
3. Leibniz Institute of Surface Engineering, Permoserstraße 15, 04318 Leipzig, Germany
4. Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany