文献类型：期刊文献

英文题名：Giant electrocaloric response in compositional manipulated BaTiO3 relaxor-ferroelectric system

作者：Hou, Ying[1];Li, Jiacheng[1];Ding, Junfeng[2];Ye, Tingting[2];Liang, Ruihong[3]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, Shanghai 201899, Peoples R China

年份：2020

卷号：127

期号：6

外文期刊名：JOURNAL OF APPLIED PHYSICS

收录：;EI(收录号：20200808187254);WOS:【SCI-EXPANDED(收录号:WOS:000522036200015)】；

基金：The authors acknowledge the financial support by the Natural Science Foundation of Shanghai (Grant No. 19ZR1411900), by the National Natural Science Foundation of China (Grant Nos. 91963116 and 51303053), by the Chen-guang Talent Foundation of the Shanghai Education and Development Committee (Grant No. 14CG28), by the opening project of Key Laboratory of Inorganic Functional Materials and Devices, Chinese Academy of Sciences (Grant No. KLIFMD201707), and by the opening project of Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences (Grant No. 2018KLMP01). There are no conflicts of interest to declare.

语种：英文

外文关键词：Barium titanate - Pyroelectricity - Ferroelectric materials - Ferroelectricity - Electric fields - Heat flux

摘要：The compositional manipulation of the multiphase coexistence in relaxor-ferroelectrics has been reported to be an effective approach to generate the giant electrocaloric effect. In this work, we systemically investigate the temperature-dependent electrocaloric effect in BaZr0.18Ti0.82O3-BaSn0.11Ti0.89O3 relaxors, where Zr and Sn are introduced into BaTiO3 to develop the multiphase coexistence at the ferroelectric-paraelectric transition. Through the direct measurement by the heat flux sensor, a large temperature change around 4 K under an electric field of 10 MV m(-1), combined with a broad temperature span (20 degrees C-60 degrees C), has been observed. For comparison, the electrocaloric properties are also indirectly deduced based on Maxwell equations and Landau-Ginzburg-Devonshire phenomenological theory, and the validity of the indirect methods in this relaxor-ferroelectric system has been discussed. This work would shed light on developing giant electrocaloric materials with a wide operating temperature range. Published under license by AIP Publishing.