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Crystal-field analysis of the Cr4+ absorption and excitation spectrum in LiGaO2 oxide crystal

Published online by Cambridge University Press:  16 September 2003

S. Kammoun  and
M. Kamoun
S. Kammoun*
Affiliation:
Groupe de Physique Théorique, Département de Physique, Faculté des Sciences de Sfax, BP 802, 3018 Sfax, Tunisia
M. Kamoun
Affiliation:
Groupe de Physique Théorique, Département de Physique, Faculté des Sciences de Sfax, BP 802, 3018 Sfax, Tunisia
*
Souha.Kammoun@fss.rnu.tn
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Abstract

The absorption and excitation spectra of the tetrahedrally coordinated Cr4+ ions doped in LiGaO2 oxide crystal are measured by Kück and Hartung at room temperature. Using the experimentally determined data from these spectra, a theoretical calculation for the crystal-field levels of Cr4+:LiGaO2 was performed by Kück 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 Cr4+ doped in LiGaO2 oxide crystal based on the Racah theory is proposed in this work. The observed crystalline-field splitting of the Cr4+ terms was accounted for using a C1 symmetric Hamiltonian. In turn, reliable crystal-field and Racah parameters have been obtained. This theoretical analysis confirms the observed crystalline-field splittings of the 3F and 3P terms of the Cr4+ ion doped in the oxide crystal LiGaO2.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 24 , Issue 3 , December 2003 , pp. 209 - 213
Copyright
© EDP Sciences, 2003

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