摘要
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 Ln^(3+) in LiYF_4 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 Ce^(3+), Nd^(3+), Sm^(3+), Dy^(3+) and Yb^(3+) were in good agreement with experiment, while those of Er^(3+) deviated from experiment dramatically. Further study showed that the g factors depended strongly on B_4~6, and a slightly different B_4~6 value of -580cm^(-1) led to g factors agreeing well with the experimental values.
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 Ln^(3+) in LiYF_4 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 Ce^(3+), Nd^(3+), Sm^(3+), Dy^(3+) and Yb^(3+) were in good agreement with experiment, while those of Er^(3+) deviated from experiment dramatically. Further study showed that the g factors depended strongly on B_4~6, and a slightly different B_4~6 value of -580cm^(-1) led to g factors agreeing well with the experimental values.
基金
Project supported by the National Key Basic Research Program of China(2013CB921800)
the National Natural Science Foundation of China(11274299,11374291,11574298,11204292,11404321)
the Anhui Provincial Natural Science Foundation(1308085QE75)