文献类型：期刊文献

英文题名：Enhanced electrocaloric effect in composition gradient bilayer thick films

作者：Hou, Ying[1,2,3];Yang, Lu[1,2];Qian, Xiaoshi[1,2];Zhang, Tian[1,2];Zhang, Q. M.[1,2]

机构：[1]Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA;[2]Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA;[3]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2016

卷号：108

期号：13

外文期刊名：APPLIED PHYSICS LETTERS

收录：;EI(收录号：20161702279156);WOS:【SCI-EXPANDED(收录号:WOS:000373601400039)】；

基金：Ying Hou acknowledges the financial support by a scholarship from China Scholar Council and by the National Natural Science Foundation of China (Contract No. 51303053), and Lu Yang, the financial support by a scholarship from China Scholar Council, Tian Zhang, a fellowship from EE Department of Penn State, Xiaoshi Qian, a teaching assistantship from the EE Department of Penn State.

语种：英文

外文关键词：Zirconium compounds - Barium compounds - Electric fields - Pyroelectricity - Titanium compounds

摘要：We report the enhanced electrocaloric (EC) response over a broad temperature range in composition gradient Ba(ZrTi) O-3 based bilayer thick films. A large EC temperature change of -4.9K under an electric field of 10MV/m around room temperature, large electrocaloric coefficient DT/DE = 0.49 x 10(-6) KmV(-1) were observed in the BaZr0.17Ti0.83O3/BaZr0.20Ti0.80O3 bilayer thick films, which are improved compared with BaZr0.20Ti0.80O3 and BaZr0.17Ti0.83O3 homogeneous bilayer films. The result reveals the potential of the composition gradient bilayer structure in improving the electrocaloric effect, which may provide an effective route to achieve large EC temperature change under a low electric field. (C) 2016 AIP Publishing LLC.