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Inverse barocaloric effects in ferroelectric BaTiO3 ceramics

Published version
Peer-reviewed

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Authors

Stern-Taulats, E 
Barrio, M 
Defay, E 
Egilmez, M 

Abstract

jats:pWe use calorimetry to identify pressure-driven isothermal entropy changes in ceramic samples of the prototypical ferroelectric BaTiO3. Near the structural phase transitions at ∼400 K (cubic-tetragonal) and ∼280 K (tetragonal-orthorhombic), the inverse barocaloric response differs in sign and magnitude from the corresponding conventional electrocaloric response. The differences in sign arise due to the decrease in unit-cell volume on heating through the transitions, whereas the differences in magnitude arise due to the large volumetric thermal expansion on either side of the transitions.</jats:p>

Description

Keywords

40 Engineering, 4016 Materials Engineering

Journal Title

APL Materials

Conference Name

Journal ISSN

2166-532X
2166-532X

Volume Title

4

Publisher

AIP Publishing
Sponsorship
Engineering and Physical Sciences Research Council (EP/M003752/1)
The Royal Society (uf120210)
European Research Council (680032)
European Research Council (Starting Grant ID: 680032), Engineering and Physical Sciences Research Council (Grant ID: EP/M003752/1), CICyT (Spain) (Project Nos. MAT2013-40590-P and FIS2014-54734-P), DGU (Catalonia) (Project No. 2014SGR00581), SUR (DEC Catalonia), AGAUR, FNR Luxembourg through COFERMAT project, Royal Society