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.
This is a preview of subscription content, access via your institution
Access options
Access Nature and 54 other Nature Portfolio journals
Get Nature+, our best-value online-access subscription
$29.99 / 30 days
cancel any time
Subscribe to this journal
Receive 12 print issues and online access
$259.00 per year
only $21.58 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
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.
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.
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.
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.
Additional information
Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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).
Rights and permissions
About this article
Cite this article
Electrocaloric effects at a phase transition created by strain. Nat. Mater. (2024). https://doi.org/10.1038/s41563-024-01836-w
Published:
DOI: https://doi.org/10.1038/s41563-024-01836-w
