skip to main content

SciTech ConnectSciTech Connect

Title: Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films

We report the influence of epitaxial strain u{sub m} on the elastocaloric properties of BaTiO{sub 3} thin films. Using thermodynamic calculations, we show that there exists a critical compressive stress σ{sub 3c} at which the elastocaloric effect is maximized for any compressive misfit strain we investigate. Moreover, it is found that |σ{sub 3c}| decreases significantly with decreasing |u{sub 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 σ{sub 3c}. 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.
Authors:
;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Laboratoire Structures, Propriétés et Modélisation des Solides, UMR 8580 CNRS-CentraleSupélec, Grande Voie des Vignes, Châtenay-Malabry Cedex 92295 (France)
  2. (China)
  3. Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049 (China)
  4. Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701 (United States)
  5. Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE (United Kingdom)
Publication Date:
OSTI Identifier:
22415152
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM COMPOUNDS; EPITAXY; FERROELECTRIC MATERIALS; STRAINS; STRESSES; THERMOELECTRIC PROPERTIES; THIN FILMS; TITANATES