%0 Journal Article %T Electrocaloric effect and energy storage in lead free Gd0.02Na0.5Bi0.48TiO3 ceramic %+ Laboratoire de Physique de la Matière Condensée - UR UPJV 2081 (LPMC) %+ Faculté des Sciences de Sfax %+ Jozef Stefan Institute [Ljubljana] (IJS) %A Zannen, M. %A Lahmar, A. %A Kutnjak, Z. %A Belhadi, J. %A Khemakhem, H. %A El Marssi, M. %< avec comité de lecture %@ 1293-2558 %J Solid State Sciences %I Elsevier %V 66 %P 31-37 %8 2017 %D 2017 %R 10.1016/j.solidstatesciences.2017.02.007 %Z Physics [physics]/Condensed Matter [cond-mat]Journal articles %X The electrocaloric effect (EC) was investigated in the ferroelectric lead-free Gd0.02Na0.5Bi0.48TiO3 (GdNBT) ceramics. A pure perovskite structure was observed by the X-ray diffraction in GdNBT ceramics synthesized by a solid-state reaction method. Dielectric measurements revealed the existence of different ferroelectric and antiferroelectric transformations in this material. Based on the temperature dependence of P-E loops, reversible electrocaloric temperature changes of about Delta T = 0.75 K at the electric field of 90 kV/cm and the EC responsivity Delta T/Delta E approximate to 0.08 x 10(-6) K m V-1 were obtained in the GdNBT ceramics. The energy-storage density W = 0.85 J cm(-3) and the associated efficiency (eta = 65%) at 413 K were determined from the P-E loops data. The simultaneous existence of EC responsivity and energy-storage density makes GdNBT very promising lead-free material and opens a great potential for its application in electronic devices. (C) 2017 Elsevier Masson SAS. All rights reserved. %G English %L hal-03627580 %U https://u-picardie.hal.science/hal-03627580 %~ UNIV-PICARDIE %~ U-PICARDIE %~ LPMC-UPJV