A Study of 90°Ferroelectric Domains in Potassium Tantalate Niobate Crystals by Means of Transmission Electron Microscopy  

作　　者：XU Huiping LI Qi SHEN Guangjun WANG Luchun SHA Zhenshun ZHU Jianming FENG Duan WANG Jiyang 

机构地区：[1]National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210008 [2]Analysis Center,Southeastern University,Nanjing 210008 [3]Department of Physics,Nanjing University,Nanjing 210008 [4]Institute of Crystal Materials,Shandong University,Jinan 250100

出　　处：《Chinese Physics Letters》1993年第5期298-301,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China。

摘　　要：By flux method,potassium tantalate niobate crystals with 46%Nb contents were prepared.In this material 90°a-type domains with(011)and(01ī)walls were observed by a transmission electron microscope,and the nature of fringe patterns associated with these domain walls was analysed.According to the extinction rules for the domain walls,the displacement vector R along<01ī>direction can be determined.Finally,using a selected area electron diffraction method,we examined the crystallographic character of these 90°domains and defined the ratio of lattice parameters c to a.

关 键 词：walls ELECTRON POTASSIUM 

分 类 号：O17[理学—数学]