Effect of unsaturated or saturated ferroelectric polarization on electrocaloric effect

被引:0
作者
Li, Junjie [1 ,2 ,3 ]
Yin, Ruowei [4 ,5 ]
Hou, Yuxuan [4 ,5 ]
Xiong, Zhe [6 ]
Wang, Yi [1 ,2 ]
Cheng, Huimin [1 ,2 ]
Su, Xiaopo [4 ,5 ]
Zhang, Xing [1 ,2 ,3 ]
Wu, Wenjuan [1 ,2 ,3 ]
Li, Lezhong [1 ,2 ,3 ]
Bai, Yang [4 ,5 ]
机构
[1] Chengdu Univ Informat Technol, Chengdu IC Valley Ind Coll, Sichuan Prov Key Lab Informat Mat & Devices Applic, Chengdu 610225, Peoples R China
[2] Chengdu Univ Informat Technol, Coll Optoelect Engn, Chengdu IC Valley Ind Coll, Chengdu 610225, Peoples R China
[3] Chengdu Univ Informat Technol, Sichuan Meteorol Optoelect Sensor Technol & Applic, Chengdu 610225, Peoples R China
[4] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China
[5] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
[6] Chengdu Hongming Elect Co Ltd, Chengdu 610199, Peoples R China
关键词
ELECTRIC-FIELD; THIN-FILM; PERFORMANCE;
D O I
10.1063/5.0237440
中图分类号
O59 [应用物理学];
学科分类号
摘要
The pursuit of high-efficiency and zero-emission refrigeration technologies has spurred interest in electrocaloric (EC) refrigeration utilizing ferroelectric (FE) materials, where accurate characterization of the EC effect is crucial for comprehending its underlying physical mechanisms and for developing high-performance EC materials. In this study, we investigate the influence of unsaturated vs saturated FE polarization characteristics on EC effects using Pb0.99Nb0.02[(Zr0.6Sn0.4)(0.85)Ti-0.15](0.98)O-3 ceramics. Direct EC measurement reveals that unsaturated loops can introduce substantial errors and even fake negative EC effects when employing the Maxwell approach for indirect EC measurement. In contrast, relatively accurate indirect EC results can be obtained using saturated FE hysteresis loops. Furthermore, it also highlights the necessity for saturated polarization conditions to achieve optimal EC performance in FEs. This work not only emphasizes the importance of carefully selecting polarization data for indirect EC measurements, but also presents a universal strategy to enhance EC effects in various materials.
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页数:7
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