Study on superstructure in ion co-doped BiFeO_3 by using transmission electron microscopy  

作　　者：蒲十周 郭超 李美亚 陈珍莲 邹化民 

机构地区：[1]Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology,Wuhan University [2]Center for Electron Microscopy, Wuhan University [3]Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2015年第4期290-295,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.51372174,11074193,and 51132001);the Fundamental Research Funds for the Central Universities

摘　　要：La3＋ and V5＋ co-doped BiFeO3 ceramics are synthesized by rapid liquid sintering technique. The modulated structure in Bi0.85La0.15Fe0.97V0.03O3 is investigated by using transmission electron microscopy （TEM）. Two kinds of superstructures are observed in the samples. One is the component modulated superstructure and twin-domain, which is generated by La3＋ ordered substitution for Bi3＋ and frequently appears. The chemical composition of the superstructure is explored by x-ray energy dispersive spectroscopy （EDS）. The model of the ordered structure is proposed. Simulation based on the model is conducted. The second is the fluorite-type δ-Bi2O3 related superstructure. The relation between the ferroelectric property and the microstructure of the sample is also discussed.La3＋ and V5＋ co-doped BiFeO3 ceramics are synthesized by rapid liquid sintering technique. The modulated structure in Bi0.85La0.15Fe0.97V0.03O3 is investigated by using transmission electron microscopy （TEM）. Two kinds of superstructures are observed in the samples. One is the component modulated superstructure and twin-domain, which is generated by La3＋ ordered substitution for Bi3＋ and frequently appears. The chemical composition of the superstructure is explored by x-ray energy dispersive spectroscopy （EDS）. The model of the ordered structure is proposed. Simulation based on the model is conducted. The second is the fluorite-type δ-Bi2O3 related superstructure. The relation between the ferroelectric property and the microstructure of the sample is also discussed.

关 键 词：multiferroic materials SUPERSTRUCTURE CO-DOPED rapid liquid sintering technique 

分 类 号：TN16[电子电信—物理电子学]