| 近化学计量比Tb:Fe:LiNbO3晶体的光谱特性及组分测定 |
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| 引用本文： | 刘金伟,刘国庆,江竹青,陶世荃. 近化学计量比Tb:Fe:LiNbO3晶体的光谱特性及组分测定[J]. 人工晶体学报, 2006, 35(2): 315-318 |
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| 作者姓名： | 刘金伟 刘国庆 江竹青 陶世荃 |
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| 作者单位： | 北京工业大学应用数理学院,北京,100022;北京工业大学应用数理学院,北京,100022;北京工业大学应用数理学院,北京,100022;北京工业大学应用数理学院,北京,100022 |
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| 基金项目： | 国家自然科学基金(No.60377003)，北京市教委科技发展计划资助项目(No.05006012200201) |
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| 摘 要： | 按化学计量比,用提拉法成功生长了不同掺量的Tb:Fe:LiNbO3晶体,分别测量了掺杂LiNbO3晶体在紫外(313nm)曝光前后的吸收光谱,曝光后吸收谱线整体上移,找到了吸收谱线上移最大的掺量比.并用差热分析仪DTA测量了居里温度Tc, 从而计算出Li/Nb的比例.分析表明,Tb:Fe:LiNbO3晶体的存储性能与掺量、定比有密切的联系,是一种优良的大容量体全息记录材料.
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| 关 键 词： | 铌酸锂晶体 近化学计量比 吸收光谱 组分测定 |
| 文章编号： | 1000-985X（2006）02-0315-04 |
| 收稿时间： | 2005-07-25 |
| 修稿时间： | 2005-07-25 |
Spectrum Properties and Compound Mensuration of Near-stoichiometric Tb:Fe:LiNbO3 Crystals |
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| LIU Jin-wei,LIU Guo-qing,JIANG Zhu-qing,TAO Shi-quan. Spectrum Properties and Compound Mensuration of Near-stoichiometric Tb:Fe:LiNbO3 Crystals[J]. Journal of Synthetic Crystals, 2006, 35(2): 315-318 |
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| Authors: | LIU Jin-wei LIU Guo-qing JIANG Zhu-qing TAO Shi-quan |
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| Affiliation: | College of Applied Sciences, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | According to stoichiometry,the Tb:Fe:LiNbO_3 crystals with no defect were grown from melt by Czochraski technique.The absorption spectrua(400-700nm) of different doped LiNbO_3 crystals before and after UV irradiation(313nm) were measured respectively.The results showed that the doped crystals have a strong absorption after UV irradiation,and the doped proportion for the doped LiNbO_3 crystals of the strongest absorption spectrum was found.Curie temperature Tc was measured by differential thermal analysis(DTA),and the proportion of Li/Nb was calculated further.The analysis results showed that the holographic storage property of Tb:Fe:LiNbO_3 crystals is related to the impurity concentration and stoichiometry.It is a good recording material used in the volume holographic storage. |
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| Keywords: | lithium niobate crystals near-stoichiometric absorption spectrum compound mensuration |
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