Giant electrocaloric effect of PbTiO3 thin film tuned in a wide temperature range by the anisotropic misfit strain

被引：9
|
作者：
Li, B. [1 ,2 ]
Zhang, X. [1 ,2 ]
Wang, J. B. [1 ,2 ]
Zhong, X. L. [1 ,2 ]
Wang, F. [1 ,2 ]
Zhou, Y. C. [1 ,2 ]
机构：
[1] Xiangtan Univ, Key Lab Low Dimens Mat & Applicat Technol, Minist Educ, Xiangtan 411105, Hunan, Peoples R China
[2] Xiangtan Univ, Fac Mat Optoelect & Phys, Xiangtan 411105, Hunan, Peoples R China
来源：
MECHANICS RESEARCH COMMUNICATIONS | 2014年 / 55卷
基金：
中国国家自然科学基金;
关键词：
Anisotropic misfit strain; Electrocaloric effect; Ferroelectric; Thin film; DIELECTRIC-PROPERTIES; INPLANE STRAINS;
D O I：
10.1016/j.mechrescom.2013.10.016
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The influence of anisotropic in-plane strains on the electrocaloric effect (ECE) in PbTiO3 (PT) epitaxial ferroelectric thin films is investigated by using a Landau-Devonshire thermodynamic theory. The calculation results show that the anisotropic strain can tune the ECE of PT ferroelectric thin films to obtain a large adiabatic temperature change in a wide temperature range which is attributed to the shift of c-phase boundary of PT thin films under the anisotropic strains with an external electric field. These results indicate that the anisotropic strain can provide an efficient way to adjust the ECE of ferroelectric thin films to refrigerate in a wide temperature range. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：40 / 44
页数：5
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