Composition and misfit strain dependence of electrocaloric effect of Pb1-xSrxTiO3 thin films

doi:10.1088/1674-1056/22/1/017701

Abstract A Landau-Devonshire thermodynamic theory is employed to investigate the effects of composition and misfit strain on the room-temperature electrocaloric effect of epitaxial Pb_1-xSr_xTiO₃ thin films. The “temperature-misfit strain” phase diagrams with the Sr composition x of 0.1, 0.3, and 0.5 are constructed. The introduction of Sr composition reduces the Curie temperature greatly, and enhances the electrocaloric effect. Moreover, the electrocaloric effect largely depends on the misfit strain. Therefore, the Sr composition and the misfit strain can be controlled to obtain the giant room-temperature electrocaloric effect.

Keywords: phase diagram phase transition electrocaloric effect

Received: 26 April 2012
Revised: 01 June 2012
Accepted manuscript online:

PACS:	77.22.Ej	(Polarization and depolarization)
	77.70.+a	(Pyroelectric and electrocaloric effects)
	77.80.Bh

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10904053), the Natural Science Foundation for Colleges and Universities of Jiangsu Province, China (Grant No. 09KJB140002), and the Priority Academic Program Development of Jiangsu Higher Education Institutions and Qing Lan Project.

Corresponding Authors: Ding Jian-Ning
E-mail: dingjn@cczu.edu.cn

Cite this article:

Qiu Jian-Hua (邱建华), Ding Jian-Ning (丁建宁), Yuan Ning-Yi (袁宁一), Wang Xiu-Qin (王秀琴) Composition and misfit strain dependence of electrocaloric effect of Pb_1-xSr_xTiO₃ thin films 2013 Chin. Phys. B 22 017701

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Composition and misfit strain dependence of electrocaloric effect of Pb1-xSrxTiO3 thin films

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Composition and misfit strain dependence of electrocaloric effect of Pb_1-xSr_xTiO₃ thin films