ELECTRON PARAMAGNETIC RESONANCE STUDY OF MANGANESE IN STRONTIUM FLUORIDE

The room-temperature, electron paramagnetic resonance spectrum of a dilute (0.01%) substitution of Mn2+ ions in a single crystal of SrF 2 has been measured. The parameters of the manganese resonance measured at 9.507 GHz are g = 2.0014±0.0010 and |A2|= (94.0Ü.9) ×10-4 cm-1. The cubic field splitting was not resolved. The magnitude of the nearest neighbor hyperfine interaction with surrounding fluorines is |A2| = (8.11±0.70) ×10-4 cm-1 and |Ap|= (2.02±0.25) ×1 0-4 cm-1, indicating 0.68% a character in the manganese-to-fluorine bond. Ap is in agreement with the calculated magnetic dipolar interaction between manganese and fluorine nuclei, assuming no p, bonding and no lattice distortion. These results are compared with similar data on ZnF2, CaF2, CdF2, KMgF3, CdT1, and BaF2.