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Fano׳s antiresonance and crystal-field study of Cr3+ in metaphosphate glasses

Abstract : This work is devoted in first part to a study of the features observed on the 4T2g (4F) absorption band of phosphate glasses containing Cr3+. These features results from interaction of the 2Eg (2G) and 2T1g (2G) sharp levels with the vibrationally broadened 4T2g (4F) quasi-continuum via spin–orbit coupling and have been analyzed in the frame of the Fano׳s antiresonance model. In second part, the electronic structure of Cr3+ ion occupying Oh site symmetry in the phosphate glasses is determined by the crystal-field analysis. The influence of the different oxides (Na2O, PbO, ZnO) on the spectroscopic properties of Cr3+ is evaluated. In metaphosphate glasses, we found that Na2O and PbO oxides act as glass modifiers while ZnO enters the glass forming network.
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https://hal-univ-lemans.archives-ouvertes.fr/hal-02147111
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Soumis le : mardi 4 juin 2019 - 14:27:31
Dernière modification le : mardi 18 janvier 2022 - 11:47:22

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O. Taktak, H. Souissi, Olfa Maalej, Brigitte Boulard, S. Kammoun. Fano׳s antiresonance and crystal-field study of Cr3+ in metaphosphate glasses. Journal of Luminescence, Elsevier, 2016, 180, pp.183-189. ⟨10.1016/j.jlumin.2016.08.034⟩. ⟨hal-02147111⟩

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