Strong Anisotropy of KTiOPO4 Crystals under an Electric Field Observed by Synchrotron Radiation Topography

• 作者: J.Y.WANG W.J.LIU
• 来源期刊: 同步辐射装置用户科技论文集
• 学科: 物理学
• 关键词: KTiOPO4晶体 电场 同步辐照地形观测
• 年，卷（期）: 1999,（1）
• 页码范围: 199-204
• 页数: 6页
• 分类号: O741.1

摘要

In-situ white-beam synchrotron radiation topographic observations under an electric field have been made on KTiOPO4 family crystals.The investigation shows a strong enhancement of diffracted intensity of hkl reflections(l≠0) and the topographic extinction contrast,when the field is applied along the polar axis.Doped and undoped samples with grown-in defects are studied in detail.It is believed that the movement of K^+ ions driven by the field leads to a local accumulation of charges and the lattice distortion.All the field-related phenomena appear to be related to the one-dimensional ionic conductance.