1. Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
2. Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32310,
United States
3. Institut Néel, CNRS/UJF, BP 166, 25 Avenue des Martyrs,
38042, Grenoble, Cedex 9, France
4. Department
of Physics and National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310,
United States