Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

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

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

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 | σ 3 c | decreases significantly with decreasing | u m |, 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
Journal	Applied Physics Letters
Volume	106
Issue number	3
DOIs	https://doi.org/10.1063/1.4906198
State	Published - 19 Jan 2015

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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 | σ 3 c | decreases significantly with decreasing | u m |, 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 F.\} and Brahim Dkhil",

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doi = "10.1063/1.4906198",

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T1 - Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

AU - Liu, Yang

AU - Wei, Jie

AU - Lou, Xiaojie

AU - Bellaiche, L.

AU - Scott, James F.

AU - Dkhil, Brahim

PY - 2015/1/19

Y1 - 2015/1/19

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 | σ 3 c | decreases significantly with decreasing | u m |, 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 | σ 3 c | decreases significantly with decreasing | u m |, 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.

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DO - 10.1063/1.4906198

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SN - 0003-6951

VL - 106

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

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ER -

Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

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