1. Department of Chemistry, University of North Florida, 1 UNF Drive, Jacksonville, Florida 32224, United States
2. Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
3. National High Magnetic Field Laboratory
(NHMFL), Florida State University, Tallahassee, Florida 32310, United States
4. Physics Institute and Institute of Nanotechnology, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
5. Institut Nèel, CNRS, 38042 Grenoble, France