| Cr,Mg:GSGG 晶体生长、光谱性能及Cr4+形成机理的研究 |
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| 引用本文： | 姜大朋,苏良碧,徐军,唐慧丽,吴锋,郑丽和,王庆国,郭鑫,邹宇琦.Cr,Mg:GSGG 晶体生长、光谱性能及Cr4+形成机理的研究[J].物理学报,2012,61(3):38102-038102. |
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| 作者姓名： | 姜大朋 苏良碧 徐军 唐慧丽 吴锋 郑丽和 王庆国 郭鑫 邹宇琦 |
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| 作者单位： | 1. 中国科学院上海硅酸盐研究所,上海201800 中国科学院研究生院,北京100049
2. 中国科学院上海硅酸盐研究所,上海,201800 |
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| 基金项目： | 国家自然科学基金(批准号: 60938001, 60908030) 资助的课题. |
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| 摘 要： | 采用传统提拉法单晶生长技术成功生长出了Cr,Mg:GSGG晶体, 并对生长出的晶体样品进行了氧化气氛和还原气氛退火处理. 通过对比分析退火处理前后样品吸收光谱的变化, 推断出晶体中四面体配位Cr4+离子的形成机理为: 晶体生长和高温氧化气氛退火的过程中, 四价Cr4+离子首先在八面体格位上形成, 然后在热激发作用下与邻近四面体格位上的Ga3+离子发生置换反应, 从而形成一定浓度的四面体配位Cr4+离子. 实验结果还表明, 随着电荷补偿离子Mg2+离子浓度的增大, 更有利于提高四面体配位Cr4+离子的浓度.
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| 关 键 词： | Cr Mg:GSGG单晶 退火处理 四面体格位 光谱性质 |
| 收稿时间： | 5/7/2011 12:00:00 AM |
Study of growth, spectra properties and Cr4+ formation mechanism of Cr,Mg:GSGG crystal |
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| Jiang Da-Peng,Su Liang-Bi,Xu Jun,Tang Hui-Li,Wu Feng,Zheng Li-He,Wang Qing-Guo,Guo Xin and Zou Yu-Qi.Study of growth, spectra properties and Cr4+ formation mechanism of Cr,Mg:GSGG crystal[J].Acta Physica Sinica,2012,61(3):38102-038102. |
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| Authors: | Jiang Da-Peng Su Liang-Bi Xu Jun Tang Hui-Li Wu Feng Zheng Li-He Wang Qing-Guo Guo Xin and Zou Yu-Qi |
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| Institution: | Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China; Graduate School of Chinese Academy of Sciences, Beijing 100049, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China; Graduate School of Chinese Academy of Sciences, Beijing 100049, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China; Graduate School of Chinese Academy of Sciences, Beijing 100049, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China |
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| Abstract: | Cr,Mg:GSGG crystals are successfully grown by the Czochralski method. The influences of reducing- and oxidizing- annealing treatments on the absorption spectra of Cr,Mg:GSGG crystals are investigated. From the changes of their absorption spectra, it can be inferred that the Cr4+ ions are initially generated at octahedrally coordinated sites, and then exchange positions with tetrahedral Ga3+ ions in neighboring sites under heat exciting. Differences between absorption spectra also suggest that Mg2+ ions can improve the concentration of tetrahedral Cr4+ ions. |
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| Keywords: | Cr Mg:GSGG crystal annealing treatment tetrahedral sites spectroscopic characteristics |
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