1. Study on the temperature dependence of the OH absorption band in Hf-doped LiNbO crystals.
- Author
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Shen, Xunan, Yan, Wenbo, Jing, Jianli, Shi, Lihong, Jia, Fangfang, Liang, Guohong, Huang, Yingying, Wu, Meng, Zhang, Yuwei, Dong, Haiyun, Zhang, Jiushuang, Chen, Guifeng, and Chen, Hongjian
- Subjects
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INTERMEDIATES (Chemistry) , *SOLUTION (Chemistry) , *IONS , *THERMAL properties of crystals , *ELECTRIC properties of crystals , *CRYSTAL lattices - Abstract
We study in this paper the temperature dependence of the OH absorption band in LiNbO crystals with different Hf-doping concentrations. It is found that the shoulder at 3500 cm appears in the doping level of 2.6 mol%, becomes more evident at 3 and 4 mol%, and then gradually faints when the doping concentration increases. This result is explained by the non-monotonic change of Nb vacancy density in the three stages of the defect evolution involved in the Hf incorporation of LN lattice. Moreover, the absorption difference analysis of the OH bands is consistent with this explanation and reveals that the mobility of H ions may be reduced by the strong trapping of the highly electronegative Nb vacancies. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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