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Analysis of the electric field dependence on the electrocaloric properties on BaHf0.11Ti0.89O3 ferroelectric ceramics

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Abstract

Based on the experimental data of the isothermal polarization P(T,E) of BaHf0.11Ti0.89O3 bulk ceramic, entropy change (∆S), temperature change (∆T), and heat carrying capacity (∆Q) of the material are evaluated in detail using an artificial neural network (ANN) procedure. As a result, the maximum ECE occurs above TC and shifts to higher temperatures with increasing applied field. The BaHf0.11Ti0.89O3 ceramic exhibits large ECE parameters around the Curie temperature (TC) associated with a relatively broad electrocaloric temperature span. Furthermore, under different electric fields, many figures of merit such as relative cooling power, temperature-averaged entropy change, and normalized refrigerant capacity are explored, making the sample a promising material for green cooling devices. Such figures of merit increase monotonically with the enhancement of the applied field. In addition, the field dependence of the ∆S and ∆T is thoroughly investigated. The master curve and the exponent n controlling the field dependence of both magnitudes confirm the second-order character of the electric phase transition of the sample. The ANN method provides very accurate and fast predictions with a small amount of experimental data. Therefore, this method accelerates the characterization of novel electrocaloric materials by shortening the time necessary for experimentation.

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The data that support the findings of this study are available from the corresponding author on request.

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Acknowledgements

This study is supported by the Tunisian Ministry of Higher Education and Scientific Research and the Prince Sultan University.

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  1. Unité de Recherche Matériaux Avancés et Nanotechnologies (URMAN), Institut Supérieur des Sciences Appliquées et de Technologie de Kasserine, Kairouan University, BP 471, 1200, Kasserine, Tunisia

    R. M’nassri & H. Rahmouni

  2. Institut National des Sciences Appliquées et de Technologie, INSAT, Carthage University, Centre Urbain Nord, BP 676, 1080, Tunis Cedex, Tunisia

    R. M’nassri

  3. Department of Mathematics and General Sciences, Prince Sultan University, P. O. Box 66833, Riyadh, 11586, Saudi Arabia

    Muaffaq M. Nofal

  4. General Science Department, Prince Sultan University, Woman Campus, P. O. Box 66833, Riyadh, 11586, Saudi Arabia

    Elham M. A. Dannoun

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M’nassri, R., Nofal, M.M., Dannoun, E.M.A. et al. Analysis of the electric field dependence on the electrocaloric properties on BaHf0.11Ti0.89O3 ferroelectric ceramics. Appl. Phys. A 128, 997 (2022). https://doi.org/10.1007/s00339-022-06144-1

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