Abstract
The crystal-field model is applied to a series of scheelites crystals (CaWO 4, SrWO 4, PbWO 4, BaWO 4, CdMoO 4, CaMoO 4, SrMoO 4 and PbMoO 4) doped with the Yb 3+ ion. The calculated crystal-field parameters present a general trend of variation with M 2+ ionic radius of the host cation. The maximum splitting Δ E of the 2F 7/2 manifold of the Yb 3+ ion is then obtained as a function of N V crystal-field strength parameters. The agreement between experimental results and theoretical predictions for all investigated systems is very satisfactory. The crystal-field effects are very important for the prediction of emission energies of the Yb 3+ ion in different scheelites.
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