Research on defects and domain characteristics of MgO-doped near-stoichiometric lithium tantalate in room-temperature polarization process

• 来源期刊: 科学通报(英文版)
• 学科: 物理学
• 关键词: 钽酸锂晶体 近化学计量比 边缘缺陷 镁掺杂 多极化 计量室 氧化镁 进程
• 年，卷（期）: 2010,（1）
• 所属期刊栏目: ARTICLES
• 页码范围: 11-15
• 页数: 5页
• 分类号: O738 TQ174.758
• 语种: 英文

摘要

MgO-doped congruent and near-stoichiometric lithium tantalate single crystals were grown by Czochralski technique and flux method respectively. Optical absorption studies showed that the UV absorption edge was very sensitive to the composition of the crystals and the decrease in defects led to the blue-shift of the UV-edge. The unit domain shape also related to the composition, and the observed results of the crystal wafers that etched by hydrofluoric acid indicate that the domain structure of near- stoichi...