Strain effect on coercive field of epitaxial barium titanate thin films

被引：47

作者：

Choudhury, S. ^{[1
]}

Li, Y. L. ^{[1
]}

Chen, L. Q. ^{[1
]}

Jia, Q. X. ^{[2
]}

机构：

[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[2] Los Alamos Natl Lab, MPA STC, MS K763, Los Alamos, NM 87545 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 14期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2908210

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Strain is generally known to increase the coercive field of a ferroelectric thin film as compared to a stress-free single crystal or a strain-relaxed film. We studied the coercive fields and remanent polarizations of (001)-oriented epitaxial barium titanate thin films using the phase-field approach. It is demonstrated, while the remanent polarization decreases as in-plane strain changes from being compressive to tensile, the variation of coercive field with strain is complicated. We noted more than two times drop in coercive field with a reduction of compressive strain of only similar to 0.05%, which we attribute to the existence of multiple ferroelectric phases. (C) 2008 American Institute of Physics.

引用

页数：3

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