Effects of oxygen vacancies on polarization stability of barium titanate

被引：11

作者：

Wang, Jun ^{[1
]}

Shen, YaoGen ^{[2
]}

Song, Fan ^{[1
]}

Ke, FuJiu ^{[3
]}

Bai, YiLong ^{[1
]}

Lu, ChunSheng ^{[4
]}

机构：

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China

[2] City Univ Hong Kong, Dept Mech & Biomed Engn, Hong Kong, Hong Kong, Peoples R China

[3] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China

[4] Curtin Univ, Dept Mech Engn, Perth, WA 6845, Australia

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2016年 / 59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; DYNAMICS; SIMULATION;

D O I：

10.1007/s11433-015-5754-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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：1 / 4

页数：4

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