文章基本信息

标题：Strain assisted electrocaloric effect in PbZr_0.95Ti_0.05O₃ films on 0.7Pb(Mg_1/3Nb_2/3)O₃-0.3PbTiO₃ substrate
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作者：Zhenghu Zuo ; Bin Chen ; Baomin Wang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep16164
出版社：Springer Nature
摘要：Solid state cooling technologies based on electrocaloric, magnetocaloric and mechanocaloric effects have received much attention during the past decade. To further improve the cooling efficiency and reduce the driving field, it is desirable to combine multiple effects in a single system. Here, we report on the caloric effects induced by both electric field and strain in PbZr_0.95Ti_0.05O₃ films deposited on 0.7Pb(Mg_1/3Nb_2/3)O₃-0.3PbTiO₃ substrate. The isothermal entropy change ( ΔS ) induced by the antiferroelectric-ferroelectric phase transition of PbZr_0.95Ti_0.05O₃ films is calculated to be 6.78 J K⁻¹ kg⁻¹. Furthermore, the strain from 0.7Pb(Mg_1/3Nb_2/3)O₃-0.3PbTiO₃ substrate can reduce the electric field where ΔS reaches the maximum by as much as 50 kV/cm. The electrocaloric efficiency is also increased from 0.366 to 0.378 by the strain effect. The electrocaloric effect in an antiferroelectric material assisted by strain may lead to more efficient solid state cooling technology.