Abstract
The parameters of hyperfine interactions in Pb3+F 8 − F a − tetragonal clusters of MeF2 crystals (Me=Ca, Sr, Ba) are interpreted. The contributions of the spin polarization to the parameters of the proper hyperfine interaction and additional (ligand) hyperfine interactions are calculated in the approximation of weak binding between a charge-compensating ion F a − and a cubic fragment in the tetragonal cluster. It is demonstrated that correct inclusion of the contributions from the spin polarization to the ligand isotropic hyperfine interaction for the F a − ion leads to anomalously large parameters of this interaction for MeF2 crystals. These results are in agreement with experimental data.
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