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Journal of Advanced Ceramics 2013, 2(4): 308-312 https://doi.org/10.1007/s40145-013-0076-7
Research Article | Open Access | Issue | Published: 04 December 2013

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

Show Author's Information Mahmoud Aly HAMAD*( )
Physics Department, Faculty of Science, Tanta University, Tanta, Egypt
Keywords:
model, heat capacity change, polarization, electrocaloric (EC) effect, PbMg1/3Nb2/3O3 (PMN), entropy change
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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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Abstract Full text About this article

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.


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About this article

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

Show Author's information Mahmoud Aly HAMAD*( )
Physics Department, Faculty of Science, Tanta University, Tanta, Egypt

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: model, heat capacity change, polarization, electrocaloric (EC) effect, PbMg1/3Nb2/3O3 (PMN), entropy change

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Publication history
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Publication history

Received: 07 April 2013
Revised: 20 June 2013
Accepted: 07 August 2013
Published: 04 December 2013
Issue date: December 2013

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© The author(s) 2013

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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.

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