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Issue 47, 2014
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Enhanced electrocaloric effect in a Ba(1−x)SrxTiO3 compositionally graded film

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Abstract

An enhanced electrocaloric (EC) effect is observed in a 300 nm compositionally graded Ba(1−x)SrxTiO3 (BST) film prepared by a sol–gel method. It is found that the maximum EC effect in the compositionally graded films is much larger than that in the uniform film with the same thickness and external field. We infer that the enhanced EC effect is attributed to internal strains and space charge accumulation existing at the interfaces of the compositionally graded film. A thermodynamic model is developed to investigate our deduction, and the results are in agreement with the experimental results.

Graphical abstract: Enhanced electrocaloric effect in a Ba(1−x)SrxTiO3 compositionally graded film

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Article information


Submitted
04 Mar 2014
Accepted
07 May 2014
First published
07 May 2014

RSC Adv., 2014,4, 24533-24537
Article type
Paper

Enhanced electrocaloric effect in a Ba(1−x)SrxTiO3 compositionally graded film

B. L. Liu, J. B. Wang, X. L. Zhong, K. Huang, B. Li, F. Wang, J. Xie and Y. C. Zhou, RSC Adv., 2014, 4, 24533
DOI: 10.1039/C4RA01875C

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