| Ti: LiAlO2新型晶体的结构分析 |
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| 引用本文： | 邹 军,黄涛华,王 军,张连翰,周圣明,徐 军.Ti: LiAlO2新型晶体的结构分析[J].物理学报,2006,55(7):3536-3539. |
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| 作者姓名： | 邹 军 黄涛华 王 军 张连翰 周圣明 徐 军 |
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| 作者单位： | (1)中国科学院上海光学精密机械研究所，上海 201800; (2)中国科学院上海光学精密机械研究所，上海 201800；中国科学院研究生院，北京 100049 |
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| 摘 要： | 通过研究提拉法生长的掺杂Ti浓度为0.2at%的LiAlO2晶体吸收光谱，荧光光谱和红外光谱，来分析此新型晶体的结构.分析发现光谱中仅出现了四价Ti离子的196nm的特征吸收峰, 用235nm光激发得到384nm的特征发射峰；针对吸收光谱中660—820nm出现的四个弱小吸收峰提出了一个色心模型，从而解释了空气和富Li气氛处理后吸收峰消失的现象；对比纯LiAlO2晶体的红外光谱发现，Ti的掺入仅影响了［AlO4］键强，而［LiO4
关键词：
2')" href="#">Ti: LiAlO2
色心
光谱
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| 关 键 词： | Ti: LiAlO2 色心 光谱 |
| 文章编号： | 1000-3290/2006/55（07）/3536-04 |
| 收稿时间： | 06 19 2005 12:00AM |
| 修稿时间： | 2005-06-192006-01-11 |
The structure analysis of novel Ti: LiAlO2 crystal |
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| Zou Jun,Huang Tao-Hu,Wang Jun,Zhang Lian-Han,Zhou Sheng-Ming and Xu Jun.The structure analysis of novel Ti: LiAlO2 crystal[J].Acta Physica Sinica,2006,55(7):3536-3539. |
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| Authors: | Zou Jun Huang Tao-Hu Wang Jun Zhang Lian-Han Zhou Sheng-Ming and Xu Jun |
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| Abstract: | The structure of novel LiAlO2 crystal with Ti concentration of 0.2 at% was studied by measuring the absorption, luminescence and IR spectra. It was found that the crystal has the 196nm typical quarivalent Ti absorption peak, and also the 384nm typical quarivalent Ti emission peak when excited by 235nm light. A color-center model successfully explains the four small peaks in the range of 660—820nm, which disappeared when the samples were annealed in air or Li-rich atmosphere. Compared to the pure LiAlO2, we can find that the intensity and situation of ［LiO4］ are unchanged. Combined with the ICP results, we can count the number of Li vacancies to be about 5.5×1020 for the Ti: LiAlO2 with dimensions of 50mm×1mm. |
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| Keywords: | Ti: LiAlO2 Color center spectra |
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