| Spectra Analysis of a Novel Ti-Doped LiAlO2 Single Crystal |
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| 作者姓名： | 邹军 周圣明 李杨 王军 张连翰 徐军 |
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| 作者单位： | [1]Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 [2]Graduate School of Chinese Academy of Sciences, Beijing 100049 |
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| 基金项目： | Supported by the Hundreds-Talents Programme of Chinese Academy of Sciences, and the National High Technology Research and Development Programme of China under Grant Nos 2004AA311080. |
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| 摘 要： | LiAlO2 single crvstals doped with Ti at concentration 0.2at.% are grown by the Czochralskl technique with dimensions φ42×55mm. Ti ions in the crystal are quadrivalence proven by comparing the absorption and fluorescence spectra of pure LiAlO2 and Ti： LiAlO2. After air and Li-rich atmosphere annealing, the absorption peaks in the range of 600-800nm disappear. We conclude that 682 and 756nm absorption peaks are attributed to the VLi and Vo absorptions, respectively： The peaks at 716nm and 798nm may stem from the VLi^＋ and absorptions. The colour-centre model can be applied to explain the experimental phenomena. Ti^4＋-doping produces more lithium vacancies in the LiAlO2 crystal. The intensities of LiO4] and the associated bonds remain unchanged, which improves the anti-hydrolyzation and thermal stability of LiAlO2 crystals.
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| 关 键 词： | LiAlO2 单晶体结构 光谱分析 Ti杂质 荧光性 |
| 收稿时间： | 2005-06-29 |
| 修稿时间： | 2005-06-29 |
Spectra Analysis of a Novel Ti-Doped LiAlO2 Single Crystal |
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| Zou Jun;Zhou ShengMing;Li Yang;Wang Jun;Zhang LianHan;Xu Jun.Spectra Analysis of a Novel Ti-Doped LiAlO2 Single Crystal[J].Chinese Physics Letters,2005,22(10):2622-2625. |
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| Authors: | Zou Jun;Zhou ShengMing;Li Yang;Wang Jun;Zhang LianHan;Xu Jun |
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