Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

Liu, Yang; Wei, Jie; Lou, Xiaojie; Bellaiche, L.; Scott, James Floyd; Dkhil, Brahim

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Date

20/01/2015

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Abstract

We report the influence of epitaxial strain um on the elastocaloric properties of BaTiO3 thin films. Using thermodynamic calculations, we show that there exists a critical compressive stress σ3c at which the elastocaloric effect is maximized for any compressive misfit strain we investigate. Moreover, it is found that |σ3c| decreases significantly with decreasing |um| , which is accompanied by a reduction of the elastocaloric response. Interestingly, a several fold enhancement in the electrocaloric effect can be achieved for stress in proximity of σ3c . The elastocaloric effect predicted here may find potential cooling applications by combining the stress-mediated electrocaloric effect or designing hybrid elastocaloric/electrocaloric devices in the future.

Citation

Liu , Y , Wei , J , Lou , X , Bellaiche , L , Scott , J F & Dkhil , B 2015 , ' Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films ' , Applied Physics Letters , vol. 106 , no. 3 , 032901 , pp. 1-5 . https://doi.org/10.1063/1.4906198

Publication

Applied Physics Letters

Status

Peer reviewed

DOI

https://doi.org/10.1063/1.4906198

ISSN

0003-6951

Type

Journal article

Rights

© 2015 AIP Publishing LLC. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1063/1.4906198

Description

Y.L., J.W., and B.D. thank the China Scholarship Council (CSC). X.J.L., J.W., Y.L., and B.D. thank the National Science Foundation of China (NSFC Nos. 51272204 and 51372195), the Ministry of Science and Technology of China through a 973-Project (No. 2012CB619401), and “One Thousand Youth Talents” program for support. L.B. thank NSF Grant No. DMR-1066158.

Collections

University of St Andrews Research

URI

http://hdl.handle.net/10023/8638