Observation of inhomogeneity in congruent LiTaO3 crystal

• 作者: B.Ten C.Q.Zhang H.D.Jiang H.Liu J.Y.Wang Q.Li S.S.Jiang X.B.Hu
• 来源期刊: 北京同步辐射装置：英文版
• 学科: 物理学
• 关键词: LITAO3晶体 钽酸锂晶体 同步辐射形貌术 结构分析 X射线分析
• 年，卷（期）: 2001,（2）
• 页码范围: 142-144
• 页数: 0页
• 分类号: O766.3

摘要

The inhomogeneity in a congrunet LiTaO3 crystal has been observed by transmission synchrotron topography.Many extraordinary regions exist in congruent LiTaO3 crystal and they often show diffraction intensity different from that of ordinary regions in synchrotron topographs.Differential thermal analysis indiates that the Curie temperature of the extraordinary region is lower than that of ordinary region,and the extraordinary region is really a high defect density region.The diffraction contrast of the extraordinary region in synchrotron topographs is explained qualitatively by a calculation at the selected wavelength.2001 Published by Elsevier Science B.V.