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Pyro-paraelectric and flexocaloric effects in barium strontium titanate: A first principles approach

Published version
Peer-reviewed

Repository DOI


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Authors

Patel, S 
Chauhan, A 
Cuozzo, J 
Lisenkov, S 
Ponomareva, I 

Abstract

jats:pInhomogeneous strain allows the manifestation of an unexplored component of stress-driven caloric effect (flexocaloric effect) and enhanced pyroelectric performance, obtainable significantly beyond the Curie point. A peak temperature change of 1.5 K (at 289 K) was predicted from first-principles-based simulations for Ba0.5Sr0.5TiO3 under the application of a strain gradient of 1.5 μm−1. Additionally, enhanced pyro-paraelectric coefficient (pyroelectric coefficient in paraelectric phase) and flexocaloric cooling 11 × 10−4 C m−2 K−1 and 1.02 K, respectively, could be obtained (at 330 K and 1.5 μm−1). A comparative analysis with prevailing literature indicates huge untapped potential and warrants further research.</jats:p>

Description

This is the author accepted manuscript. The final version is available from AIP Publishing via https://doi.org/10.1063/1.4947010

Keywords

flexocaloric, pyro-paraelectricity, solid-state refrigeration, ferroelectric

Journal Title

Applied Physics Letters

Conference Name

Journal ISSN

0003-6951
1077-3118

Volume Title

108

Publisher

AIP Publishing
Sponsorship
One of the authors (RV) acknowledges support from the Indian National Science Academy (INSA), Delhi, India, through a grant by the Department of Science and Technology (DST), Delhi, under INSPIRE faculty award-2011 (ENG-01) and INSA Young Scientists Medal-2013. AC would like to acknowledge the support of SERB, India in the form of Cambridge India Ramanujan fellowship. IP acknowledges support from the National Science Foundation Grant No. DMR-1250492 and MRI CHE-1531590.