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Electrocaloric Effect in Different Oriented BaZr_0.15Ti_0.85O₃ Single Crystals.

ABSTRACT: The electrocaloric effect of ferroelectrics is promising for new solid-state refrigeration. However, the current research on the electrocaloric effect of bulk ferroelectrics mainly focuses on (001) orientation. Thus, we studied the electrocaloric effect of BaZr_0.15Ti_0.85O₃ single crystals with different orientations through the nonlinear thermodynamic approach and entropy analysis. The results show that the dipolar entropy of (111)-oriented BaZr_0.15Ti_0.85O₃ single crystals exhibits a greater change after applying an external electric field, compared with (001)- and (110)-orientations, and the (001)-oriented electrocaloric responses are consistent with experimental observations. The (111)-oriented BaZr_0.15Ti_0.85O₃ single crystals have a more significant electrocaloric response, resulting in a broader work temperature range with a large electrocaloric effect. These insights offer an alternative way to enhance the electrocaloric response of ferroelectric single crystals.

SUBMITTER: Ou Y

PROVIDER: S-EPMC9572230 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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Electrocaloric Effect in Different Oriented BaZr0.15Ti0.85O3 Single Crystals.

Ou Yun Y Lei Chihou C Shan Dongliang D

Materials (Basel, Switzerland) 20221010 19

The electrocaloric effect of ferroelectrics is promising for new solid-state refrigeration. However, the current research on the electrocaloric effect of bulk ferroelectrics mainly focuses on (001) orientation. Thus, we studied the electrocaloric effect of BaZr0.15Ti0.85O3 single crystals with different orientations through the nonlinear thermodynamic approach and entropy analysis. The results show that the dipolar entropy of (111)-oriented BaZr0.15Ti< ...[more]

PMID: 36234358

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