Abstract
The important diluted magnetic semiconductors PbS , PbSe and PbTe have been studied by the electron paramagnetic resonance (EPR) technique. But there are not reasonable explanation reported. In this work, based on the crystal-field theory, the EPR parameters g factors of Yb3+and hyperfine structure constants of171Yb3+and173Yb3+isotopes in PbS , PbSe and PbTe crystals are calculated by the aid of diagonalizing the full energy matrix. In the calculations, the contributions of various admixtures and interactions such as the J-mixing and the covalence are considered. The crystal field parameters used in the calculations are obtained from the superposition model. The calculated results are in reasonable agreement with the observed values. The results are discussed.
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