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An alternative interpretation of the optical spectra for Fe-doped KTaO3 crystals |
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| Authors: | Zheng Wen-Chen Wu Xiao-Xuan He Lv |
| Affiliation: | a Department of Material Science, Sichuan University, Chengdu 610064, PR China b Department of Physics, Civil Aviation Flying Institute of China, Guanghan 618307, PR China c International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, PR China |
| Abstract: | In this paper, the excitation spectrum and luminescence at 14 569, 17 225, 18 829 and 14 659 cm-1 for Fe3+ ion at the K+ site of KTaO3 crystals are assigned, respectively, to the 6A1(S)→4T1(G), 4T2(G), 4E1(G)[4A1(G)] and 4T1(G)→6A1(S) transitions rather than to the 6A1(S)→4T1(G), 2T2(I), 4T2(G) and 4T1(G)→6A1(S) transitions given in a previous paper [Bryknar et al., Radiat. Eff. Def. Solids 149(1999)51]. On the basis of this assignment, the reasonable optical spectrum parameters (in particular, the cubic field parameter Dq≈−640 cm−1) are obtained. The validity of this assignment is discussed. |
| Keywords: | 71.70.Ch 78.50.Ec 78.55.Hx |
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