Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1236982 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2005 | 5 Pages |
Abstract
The spin-Hamiltonian (SH) parameters g factors gâ¥, g⥠and the hyperfine structure parameters A⥠and A⥠for Er3+ at the tetragonally distorted dodecahedral Th4+ site in ThGeO4 are theoretically investigated by using the perturbation formulas of the SH parameters for a 4f11 ion in tetragonal symmetry. In these formulas, the contributions to the SH parameters from the second-order perturbation terms and the admixture of various energy levels are taken into account. The related crystal-field parameters are calculated from the geometrical relationship of the impurity center and the superposition model. Based on the studies, the lowest Kramers doublet is found to be Î7, rather than Î6 suggested in the previous work. The calculated SH parameters for Î7 doublet in this work are smaller than those obtained for Î6 doublet in the previous work and in good agreement with the observed values. The various contributions to the SH parameters are discussed.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Shao-Yi Wu, Hui-Ning Dong, Wang-He Wei,