材料期刊网

By using crystal-field theory, the optical spectra and spin-Hamiltonian parameters (abbr. SH parameters, i.e. the anisotropic g factors g parallel to, g perpendicular to, and hyperfine structure constants A parallel to, A perpendicular to) of (171)Yb(3+) and (173)Yb(3+) isotopes in the tetragonal PbWO(4) are calculated. The theoretical results agree well with the experimental values. The crystal-field parameters and the signs of the hyperfine structure constants for both (171)Yb(3+) and (173)Yb(3+) isotopes are determined. The validities of the theoretical results are discussed.