Publication Date:
2016-04-19
Description:
Inhomogeneous 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 Ba 0.5 Sr 0.5 TiO 3 under the application of a strain gradient of 1.5 μ m −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 μ m −1 ). A comparative analysis with prevailing literature indicates huge untapped potential and warrants further research.
Print ISSN:
0003-6951
Electronic ISSN:
1077-3118
Topics:
Physics
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