A thermodynamic potential, energy storage performances, and electrocaloric effects of Ba1-xSrxTiO3 single crystals

Y. H. Huang, J. J. Wang, T. N. Yang, Y. J. Wu, X. M. Chen, L. Q. Chen

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Abstract

A thermodynamic potential for Ba1-xSrxTiO3 solid solutions is developed, and the corresponding thermodynamic properties of Ba1-xSrxTiO3 single crystals are calculated. The predicted temperature-composition phase diagram from the thermodynamic potential agrees well with the experimental measurements. Based on this potential, the energy storage performances and electrocaloric effects of Ba1-xSrxTiO3 single crystals are obtained using the phase-field method. It is found that there is an optimal Sr concentration which maximizes the discharged energy density of a Ba1-xSrxTiO3 single crystal under an applied electric field. The electrocaloric effects of Ba0.8Sr0.2TiO3, Ba0.7Sr0.3TiO3, Ba0.6Sr0.4TiO3, and Ba0.5Sr0.5TiO3 single crystals are also predicted, from which the corresponding optimal temperatures are identified.

Original languageEnglish (US)
Article number102901
JournalApplied Physics Letters
Volume112
Issue number10
DOIs
StatePublished - Mar 5 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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