Non-linear behavior of flexoelectricity

被引：18

作者：

Wang, Zhiguo ^{[1
]}

Song, Ruobing ^{[2
]}

Shen, Zhenjiang ^{[3
]}

Huang, Wenbin ^{[1
]}

Li, Chunchun ^{[4
]}

Ke, Shanming ^{[4
]}

Shu, Longlong ^{[4
]}

机构：

[1] Chongqing Univ, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China

[2] Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China

[3] Hainan Normal Univ, Coll Phys & Elect Engn, Haikou 571158, Hainan, Peoples R China

[4] Nanchang Univ, Sch Mat Sci & Engn, Nanchang 330031, Jiangxi, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2019年 / 115卷 / 25期

基金：

美国国家科学基金会;

关键词：

BARIUM STRONTIUM-TITANATE; POLARIZATION;

D O I：

10.1063/1.5126987

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Coupling between polarization and the strain gradient, namely, flexoelectricity, is a universal phenomenon that widely exists in all solid dielectrics and polymers. At a low level of the applied strain gradient, this electromechanical coupling is strictly a linear effect. In this Letter, a strong nonlinearity between the polarization and the strain gradient was experimentally found in polyvinylidene fluoride when the strain gradient was higher than a material-dependent threshold value. Such nonlinear behavior was in good accordance with an ion chain theory and could be fitted by a nonlinear equation. The observed flexoelectric nonlinearity in this work will help in the understanding of the discrepancy between the previous findings about the bulk materials and their nanoscale counterparts.

引用

页数：5

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