Electrocaloric effects at a phase transition created by strain
Source abstract
Abstract
Electrocaloric effects have not hitherto been experimentally studied at a phase transition created by strain. It is now shown that the continuous transition created by epitaxial strain in strontium titanate films greatly enhances electrocaloric effects over a wide range of temperatures, including room temperature.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Magnetic and transport properties of perovskites and related materials · Shape Memory Alloy Transformations
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References (5)
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1. Moya, X. & Mathur, N. D. Caloric materials for cooling and heating. Science 370, 793–799 (2020). A review article on electrocaloric and other caloric effects.10.1126/science.abb0973 ↗
2. Haeni, J. H. et al. Room-temperature ferroelectricity in strained SrTiO3. Nature 430, 758–761 (2004). This paper reports the experimental demonstration of the strain-induced phase transition at which we report electrocaloric effects.10.1038/nature02773 ↗
3. Biegalski, M. D. Epitaxially Strained Strontium Titanate. PhD thesis, The Pennsylvania State University https://go.nature.com/48QnXjB (2006). This PhD thesis describes conformal mapping.
4. Pertsev, N. A., Tagantsev, A. K. & Setter, N. Erratum: phase transitions and strain-induced ferroelectricity in SrTiO3 epitaxial thin films. Phys. Rev. B 65, 219901 (2002). This erratum on the canonical Landau theory revises in-plane polarization directions via recalculation with no change of parameters.10.1103/PhysRevB.65.219901 ↗
5. Crossley, S., Nair, B., Whatmore, R. W., Moya, X. & Mathur, N. D. Electrocaloric cooling cycles in lead scandium tantalate with true regeneration via field variation. Phys. Rev. X 9, 041002 (2021). This paper suggests the use of unipolar driving fields in electrocalorics.