文献类型：期刊文献

英文题名：Interfacial coupling modulation to the electrocaloric effect of Ba(Zr, Ti)O3 multilayered thick films

作者：Hou, Ying[1,2,3];Huang, Xiaohua[4];Zhao, Xiaobo[2,3];Yang, Lu[2,3];Liang, Ruihong[5]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA;[3]Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA;[4]Xiamen Univ Technol, Sch Optoelect & Commun Engn, Xiamen 361024, Fujian, Peoples R China;[5]Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China

年份：2019

卷号：125

期号：21

外文期刊名：JOURNAL OF APPLIED PHYSICS

收录：;EI(收录号：20192407049530);WOS:【SCI-EXPANDED(收录号:WOS:000470721900039)】；

基金：Ying Hou acknowledges financial support from the National Natural Science Foundation of China (NNSFC) (Grant No. 51303053), the Chen-guang Talent Foundation of Shanghai Education and Development Committee (Grant No. 14CG28), the Opening Project of Key Laboratory of Inorganic Functional Materials and Devices, Chinese Academy of Sciences (Grant No. KLIFMD201707), and the Opening Project of Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences (Grant No. 2018KLMP01).

语种：英文

外文关键词：Electric fields - Zirconium compounds - Barium compounds - Ferroelectricity - Thick films - Titanium compounds - Environmental technology - Ferroelectric ceramics - Cooling - Pyroelectricity

摘要：Negative environmental consequences of traditional cooling technologies have spurred the development of newly emerged green cooling devices rooting in electrocaloric effect (ECE). The relaxor ferroelectrics represented by BaZrTiO3 ceramics are being actively explored as a promising candidate for constructing ECE cooling devices. However, the reported electrocaloric (EC) response of BaZrTiO3 is still limited, particularly under low and moderate electric fields, which greatly inhibits its practical application. In this work, we propose an interfacial coupling modulation approach to enhance the EC response of BaZrTiO3 by introducing composition homogeneous and composition gradient multilayered structures. A systematic work was performed to study the dielectric, ferroelectric, and EC performances of BaZrTiO3 multilayered ceramics consisting of BaZr0.20Ti0.80O3 and/or BaZr0.17Ti0.83O3. It was found that the optimized BaZr0.17Ti0.83O3/BaZr0.20Ti0.80O3 bilayered films displayed the maximum EC response of 4.1K under 10MVm(-1) at ambient conditions, corresponding to a high level of the coefficient of performance up to 18.33. The results demonstrate the efficiency of interfacial coupling modulation in boosting the EC response of relaxor ferroelectric ceramics, opening up an avenue to explore advanced electrocaloric systems with a giant electrocaloric effect.