[1] Florida State Univ, Dept Chem, Tallahassee, FL 32310 USA
[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[3] Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA
[4] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA