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

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

中国物理B ›› 2013, Vol. 22 ›› Issue (1): 17701-017701.doi: 10.1088/1674-1056/22/1/017701

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

邱建华, 丁建宁, 袁宁一, 王秀琴

Center for low-dimensional materials, micro-nano devices and system, Changzhou University, Changzhou 213164, China

收稿日期:2012-04-26 修回日期:2012-06-01 出版日期:2012-12-01 发布日期:2012-12-01
基金资助:
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.

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

Qiu Jian-Hua (邱建华), Ding Jian-Ning (丁建宁), Yuan Ning-Yi (袁宁一), Wang Xiu-Qin (王秀琴)

Center for low-dimensional materials, micro-nano devices and system, Changzhou University, Changzhou 213164, China

Received:2012-04-26 Revised:2012-06-01 Online:2012-12-01 Published:2012-12-01
Contact: Ding Jian-Ning E-mail:dingjn@cczu.edu.cn
Supported by:
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.

摘要/Abstract

摘要： 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.

关键词: phase diagram, phase transition, electrocaloric effect

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.

Key words: phase diagram, phase transition, electrocaloric effect

中图分类号: (Polarization and depolarization)

77.22.Ej

77.70.+a (Pyroelectric and electrocaloric effects)

邱建华, 丁建宁, 袁宁一, 王秀琴. Composition and misfit strain dependence of electrocaloric effect of Pb_1-xSr_xTiO₃ thin films[J]. 中国物理B, 2013, 22(1): 17701-017701.

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[J]. Chin. Phys. B, 2013, 22(1): 17701-017701.

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

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

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