| LiNbO3晶体中包裹物和位错的X射线形貌研究 |
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| 引用本文： | 葛传珍,蒋树声,闵乃本,冯端.LiNbO3晶体中包裹物和位错的X射线形貌研究[J].物理学报,1987,36(4):490-494. |
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| 作者姓名： | 葛传珍 蒋树声 闵乃本 冯端 |
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| 作者单位： | 南京大学固体物理研究所 |
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| 摘 要： | 用X射线透射扫描形貌方法研究了LiNb03晶体中的包裹物和位错。在实验中发现了包裹物的相应于不同衍射矢量的X射线形貌与基于各向同性理论预言的形貌之间存在分歧,这被解释为弹性各向异性效应。同时还观察到Burgers矢量为最短点阵平移矢量1/3的纯刃型位错和次短点阵平移矢量1/3<0111>的纯螺型位错,以及由该螺型位错组成的纯扭转晶界。
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| 收稿时间： | 1986-05-19 |
A STUDY OF INCLUSIONS AND DISLOCATIONS IN LiNbO3 CRYSTALS BY X-RAY TOPOGRAPHY |
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| GE CHUAN-ZHENG,JIANG SHU-SHENG,MING NAI-BEN and FENG DUAN.A STUDY OF INCLUSIONS AND DISLOCATIONS IN LiNbO3 CRYSTALS BY X-RAY TOPOGRAPHY[J].Acta Physica Sinica,1987,36(4):490-494. |
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| Authors: | GE CHUAN-ZHENG JIANG SHU-SHENG MING NAI-BEN and FENG DUAN |
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| Abstract: | The inclusions and dislocations in LiNbO3 crystals have been studied by means of X-ray topography. The influence of elastic anisotropy on the contrast of inclusions was observed. The Burgers vectors of dislocations in this crystals were found to be of the type of 1/3〈1120〉, the smallest lattice vector, and 1/3〈0111〉, the next smallest lattice vector. The pure twist sub-boundary which consists of two sets of pure screw dislocations with Burgers vectors l/3〈101l〉 was also observed. |
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