Abstract
The EPR parameters (g factors g∥, g⊥ and hyperfine structure constants A∥, A⊥) of a tetragonal (C4v) Sm3+ center in CaF2 and SrF2 crystals are calculated by considering the crystal-field Jmixing among the ground 6H5/2, the first excited 6H7/2 and second excited 6H9/2 state multiplets. In the calculations the free-ion and crystal-field parameters of the tetragonal Sm3+-F− center obtained from polarized laser-selective excitation spectroscopy are used. The calculated results suggest that the tetragonal Sm3+-F− center is the Sm3+ center found by later EPR measurements. The g factors g∥, g⊥ and hyperfine structure constants A∥, A⊥ of this EPR center are satisfactorily explained.
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