弛豫铁电体
电热效应
材料科学
凝聚态物理
热电性
陶瓷
薄膜
铁电性
铁电陶瓷
极化(电化学)
复合材料
光电子学
纳米技术
电介质
化学
物理
物理化学
作者
Shengbo Lu,Brigita Rožič,Qiming Zhang,Zdravko Kutnjak,Xinyu Li,Eugene Furman,Lee J. Gorny,Minren Lin,Barbara Malič,Marija Kosec,R. Blinc,R. Pirc
摘要
The electrocaloric effect (ECE) in inorganic thin film and organic relaxor ferroelectrics is investigated by directly measuring the ECE around room temperature. The results reveal that giant ECEs can be obtained in the high energy electron irradiated poly(vinylidene fluoride-trifluoroethylene) relaxor copolymer and in the La-doped Pb(ZrTi)O3 relaxor ceramic thin films, which are much larger than that from the normal ferroelectric counterparts. The large ECE observed, compared with normal ferroelectrics, is likely caused by the large number of disordered fluctuating polarization entities in relaxor ferroelectrics which can lead to extra entropy contributions and larger ECE.
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