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Research Article | Open Access

Theoretical investigations on electrocaloric properties of (111)-oriented PbMg1/3Nb2/3O3 single crystal

Physics Department, Faculty of Science, Tanta University, Tanta, Egypt
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Abstract

The electrocaloric (EC) effect accompanied with the ferroelectric to paraelectric phase transition in (111)-oriented PbMg1/3Nb2/3O3 (PMN) is investigated. It is shown that the largest change ΔT is 0.37 K in 3 kV/cm electric field shift near the Curie temperature of 221 K; that is, the cooling ΔT per unit field (MV/m) is 1.23×10-6 m·K/V. This value is significantly larger, and comparable with the value of 0.254×10-6 m·K/V for PbZr0.95Ti0.05O3 thin film under larger electric field shift ΔE = 30 kV/cm. Thus, the EC effect of (111) PMN single crystal provides cooling solutions at low temperatures, and opens more opportunities for practical application in cooling systems.

Keywords

electrocaloric (EC) effectPbMg1/3Nb2/3O3 (PMN)modelpolarizationentropy changeheat capacity change

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Journal of Advanced Ceramics
Volume 2 Issue 4,
December 2013
Pages 308-312
DOI: 10.1007/s40145-013-0076-7

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HAMAD MA. Theoretical investigations on electrocaloric properties of (111)-oriented PbMg1/3Nb2/3O3 single crystal. Journal of Advanced Ceramics, 2013, 2(4): 308-312. https://doi.org/10.1007/s40145-013-0076-7

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Published: 04 December 2013
© The author(s) 2013

Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.