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.
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References
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.
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.
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This is a summary of: Zhang, S. et al. Highly reversible extrinsic electrocaloric effects over a wide temperature range in epitaxially strained SrTiO3 films. Nat. Mater. https://doi.org/10.1038/s41563-024-01831-1 (2024).
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Electrocaloric effects at a phase transition created by strain. Nat. Mater. (2024). https://doi.org/10.1038/s41563-024-01836-w
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DOI: https://doi.org/10.1038/s41563-024-01836-w