材料期刊网

The optical spectra and electron paramagnetic resonance parameters (g factors g(parallel to), g(perpendicular to) and hyperfine structure constants (171)A(parallel to,) (171)A(perpendicular to), (173)A(parallel to) and (173)A(perpendicular to)) for the tetragonal (D-2d) Yb3+ centers in AWO(4) (A = Ca, Sr, Pb and Ba) scheelite crystals are reinvestigated using a complete diagonalization (of energy matrix) method. The calculated results are in good agreement with the experimental values. The new crystal-field parameters (CFPs) obtained by fitting procedures are compared with those in the literature and the more reliable sets of CFPs for the Yb3+ ion in four scheelite crystals in this work are confirmed. The trends of the crystal-field interaction between the Yb3+ ion and its environment are studied, and the results are discussed.