| LiNbO3和LiTaO3单晶体中亚晶界位错结构的研究 |
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| 引用本文： | 葛传珍,王有涛,王建文,冯端.LiNbO3和LiTaO3单晶体中亚晶界位错结构的研究[J].物理学报,1983,32(11):1361-1368. |
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| 作者姓名： | 葛传珍 王有涛 王建文 冯端 |
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| 作者单位： | (1)南京大学固体物理研究所; (2)南京大学物理系,固体物理专业1982届毕业生 |
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| 摘 要： | 本文应用透射法和超显微法对用金缀饰后的LiNbO3和LiTaO3单晶体进行了直接观测,观察到两种晶体中亚晶界的三维面貌,对亚晶界进行了极图分析,并进一步用Frank公式进行了定量验证。通过对位错网及三叉亚晶界的分析,表明该类晶体中存在的位错的Burgers矢量是:最短点阵平移矢量——六角晶胞的基矢<1210>,次短点阵平移矢量——菱胞基矢1/3<0111>,以及再次短点阵平移矢量——菱胞短体对角线分1/3<2021>。
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| 收稿时间： | 9/9/1982 12:00:00 AM |
A STUDY OF DISLOCATION STRUCTURE OF SUBBOUND- ARIES IN LiNbO3 AND LiTaO3, SINGLE CRYSTALS |
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| GE CHUAN-ZHEN,WANG YOU-TAO,WANG JIAN-WEN and FENG DUAN.A STUDY OF DISLOCATION STRUCTURE OF SUBBOUND- ARIES IN LiNbO3 AND LiTaO3, SINGLE CRYSTALS[J].Acta Physica Sinica,1983,32(11):1361-1368. |
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| Authors: | GE CHUAN-ZHEN WANG YOU-TAO WANG JIAN-WEN and FENG DUAN |
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| Abstract: | We have made direct observations of dislocation substructure in LiNbO3 and LiTaO3 single crystals decorated by gold particles by mean of transmission optical microscopy and ultra-microscopy. The three dimentional features of the subboundaries have been disclosed and the nature of subboundaries are determined with stereographic analysis, and quantitatively verified by Frank's formula.The analysis of dislocation networks and junctions of subboundaries shows that the Burgers vectors of dislocations in these crystals are <1210>, the smallest lattice vector;1/3<0111>, the next smallest lattice vector, and 1/3 <2021>, the short diagonal of therhombohedral cell. |
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