| LiNbO3晶体中缺陷的X射线形貌研究 |
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| 引用本文： | 周衡南,蒋树声. LiNbO3晶体中缺陷的X射线形貌研究[J]. 物理学报, 1980, 29(3): 374-379 |
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| 作者姓名： | 周衡南 蒋树声 |
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| 作者单位： | 南京大学物理系 |
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| 摘 要： | 用X射线透射扫描形貌方法观察了直拉法生长LiNbO3晶体中各种类型点阵缺陷,诸如铁电畴壁、生长层、位错、亚晶界和胞状组织等;用不同衍射矢量对[001]和[210]方向生长的晶体的形貌消象规律,结合X射线铁电异常散射效应和光学显微观察,讨论了晶体中180°铁电畴和生长层的衬度及其分布,并研究了LiNbO3晶体中180°畴壁形成及其相互关系。关键词：
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| 收稿时间： | 1979-01-26 |
X-RAY DIFFRACTION TOPOGRAPHIC STUDY OF CRYSTAL DEFECT IN LiNbO3 |
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| ZHOU HENG-NAN and JIANG SHU-SHENG. X-RAY DIFFRACTION TOPOGRAPHIC STUDY OF CRYSTAL DEFECT IN LiNbO3[J]. Acta Physica Sinica, 1980, 29(3): 374-379 |
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| Authors: | ZHOU HENG-NAN and JIANG SHU-SHENG |
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| Abstract: | Various kinds of crystal defects, such as ferroelectric domain boundaries, growth bands, dislocations, subgrain boundaries and cellular structures, etc. in Czochraski-grown ferroelectric LiNbO3 single crystals were investigated by X-ray transmission topographic technique. The defects were identified by means of invisibility conditions using different diffractions, as well as X-ray anomalous scattering effect and optical microscopy. We have discussed the formation of domain boundaries in LiNbO3 and their relation to the growth bands. |
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