Effects of oxygen vacancies on polarization stability of barium titanate

被引：0

作者：

Jun Wang ^{[1
]}

Yao Gen Shen ^{[2
]}

Fan Song ^{[1
]}

Fu Jiu Ke ^{[3
]}

Yi Long Bai ^{[1
]}

Chun Sheng Lu ^{[4
]}

机构：

[1] State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences

[2] Department of Mechanical and Biomedical Engineering, City University of Hong Kong

[3] School of Physics and Nuclear Energy Engineering, Beihang University

[4] Department of Mechanical Engineering, Curtin University

来源：

Science China(Physics,Mechanics & Astronomy) | 2016年 / Mechanics & Astronomy)2016卷 / 03期

基金：

中国国家自然科学基金;

关键词：

ferroelectricity; hysteresis; oxygen vacancy; molecular dynamics simulation;

D O I：

暂无

中图分类号：

TQ174.1 [基础理论];

学科分类号：

0805 ; 080502 ;

摘要：

Oxygen vacancy, a kind of native point defects in ferroelectric ceramics, usually causes an increase of the dielectric loss. Based on experimental observations, it is believed that all of the oxygen vacancies are an unfavorable factor for energy saving. By using molecular dynamics simulations, we show that the increase of coercive and saturated electric fields is due to the difficulty to switch local polarization near an oxygen vacancy, and so that a ferroelectric device has to sustain the rising consumption of energy. The simulation results also uncover how oxygen vacancies influence ferroelectric properties.

引用

页码：95 / 98

页数：4

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