Journal of Electronic Materials

, Volume 44, Issue 12, pp 4852–4856 | Cite as

Study of the Electrocaloric Effect in the Relaxor Ferroelectric Ceramic 0.75PMN-0.25PT

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Abstract

Electrocaloric (EC) cooling based on the ability of materials to change temperature by applying an electric field under adiabatic conditions is a relatively new and challenging direction in ferroelectrics research. Analytical and simulation data for the electrocaloric effect (ECE) in 0.75Pb(Mg1/3Nb2/3)O3–0.25PbTiO3 (0.75PMN–0.25PT) bulk ceramic samples are reported. The adiabatic temperature change (ΔT) due to a change of the external electric field has been calculated indirectly from the entropy change. The temperature change increases with an increase in the applied electric field and reaches a maximum of 2.1 K in 25 kV/cm electric field shift near the Curie temperature of 398 K; that is, the cooling ΔT per unit field (MV/m) is 0.896 × 10−6 m K/V. This value is significantly large for bulk ceramics and makes the compound promising for room-temperature electric cooling applications.

Keywords

Ferroelectric relaxor pyroelectric electrocaloric 
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Copyright information

© The Minerals, Metals & Materials Society 2015

Authors and Affiliations

  • I. Kriaa
    • 1
  • N. Abdelmoula
    • 1
  • A. Maalej
    • 1
  • H. Khemakhem
    • 1
  1. 1.Laboratory of Ferroelectric Materials, LR, Physique Mathématiques et Applications (R13ES22)Faculty of Sciences of Sfax, University of Sfax, Road Soukra km 3.5SfaxTunisia

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