Abstract
Based on the completely parametric crystal-field model, the energy level parameters, including free-ion parameters and crystal-field parameters, obtained by fitting the experimental energy level data sets of Ln3+ in LiYF4 were systematically analyzed. The results revealed that the regular variation trends of the major parameters at relatively low site symmetry still existed. The g factors of ground states were calculated using the parameters obtained from least-squares fitting. The results for Ce3+, Nd3+, Sm3+, Dy3+ and Yb3+ were in good agreement with experiment, while those of Er3+ deviated from experiment dramatically. Further study showed that the g factors depended strongly on B6 4, and a slightly different B6 4 value of −580 cm−1 led to g factors agreeing well with the experimental values.
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