Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

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

doi:10.1063/1.4906198

Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

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

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Abstract

We report the influence of epitaxial strain u_m on the elastocaloric properties of BaTiO₃ thin films. Using thermodynamic calculations, we show that there exists a critical compressive stress σ₃_c 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 σ₃_c . 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.

Original language	English
Article number	032901
Pages (from-to)	1-5
Number of pages	5
Journal	Applied Physics Letters
Volume	106
Issue number	3
DOIs	https://doi.org/10.1063/1.4906198
Publication status	Published - 20 Jan 2015

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© 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
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title = "Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films",

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.",

author = "Yang Liu and Jie Wei and Xiaojie Lou and L. Bellaiche and Scott, {James Floyd} and Brahim Dkhil",

note = "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.",

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doi = "10.1063/1.4906198",

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AU - Liu, Yang

AU - Wei, Jie

AU - Lou, Xiaojie

AU - Bellaiche, L.

AU - Scott, James Floyd

AU - Dkhil, Brahim

N1 - 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.

PY - 2015/1/20

Y1 - 2015/1/20

N2 - 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.

AB - 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.

U2 - 10.1063/1.4906198

DO - 10.1063/1.4906198

M3 - Article

SN - 0003-6951

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SP - 1

EP - 5

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

M1 - 032901

ER -

Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

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