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- Title
Study on the temperature dependence of the OH absorption band in Hf-doped LiNbO crystals.
- Authors
Shen, Xunan; Yan, Wenbo; Jing, Jianli; Shi, Lihong; Jia, Fangfang; Liang, Guohong; Huang, Yingying; Wu, Meng; Zhang, Yuwei; Dong, Haiyun; Zhang, Jiushuang; Chen, Guifeng; Chen, Hongjian
- 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.
- Subjects
INTERMEDIATES (Chemistry); SOLUTION (Chemistry); IONS; THERMAL properties of crystals; ELECTRIC properties of crystals; CRYSTAL lattices
- Publication
Journal of Materials Science, 2014, Vol 49, Issue 10, p3775
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-014-8088-4