Abstract
The absorption and excitation spectra of the tetrahedrally coordinated Cr 4+ ions doped in LiGaO 2 oxide crystal are measured by Kiick and Hartung at room temperature. Using the experimentally determined data from these spectra, a theoretical calculation for the crystal-field levels of Cr 4+ .LiGaO 2 was performed by Kiick and Hartung, based on the angular overlap model theory (AOM). The calculation reveals an important discrepancy between the theoretical and the experimental energies. A detailed crystal-field analysis of electronic energy levels of Cr 4+ doped in LiGaO 2 oxide crystal based on the Racah theory is proposed in this work. The observed crystalline-field splitting of the Cr 4+ terms was accounted for using a C 1 symmetric Hamiltonian. In turn, reliable crystal-field and Racah parameters have been obtained. This theoretical analysis confirms the observed crystalline-field splittings of the 3 F and 3 P terms of the Cr 4+ ion doped in the oxide crystal LiGaO 2 .
Published Version
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