Recent findings of a large electrocaloric (EC) effect in polymeric and inorganic ferroelectric materials open a potential possibility of development of solid-state cooling or heating devices of new generation with better energy efficiency that may be less harmful for the environment. We investigate by using direct measurements, the temperature and electric field dependence of the electrocaloric response in Pb1-xLax(ZryTi1-y)1-x/4O3 bulk ceramics (PLZT) with x = 0.06 and 0.12. Here, the properties of the EC response were probed in a part of the PLZT composition phase diagram with low y = 0.40 composition, in which the EC effect was not previously studied. Measurement results show the existence of the sizeable EC response in the 12/40/60 PLZT sample with the EC temperature change (ΔTEC) of 2.92 K at 430 K and 80 kV/cm. This value exceeds previously obtained ΔTEC values in relaxor ferroelectric x/65/35 PLZT compositions, rivaling the best EC response in lead magnesium niobate-lead titanate ceramics. The electrocaloric responsivity (ΔT/ΔE) value of 0.41 × 10−6 Km/V determined at a lower electric field of 20 kV/cm and 410 K is comparable to those observed in other perovskite ferroelectrics.
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14 June 2020
Research Article|
June 08 2020
Electrocaloric response in lanthanum-modified lead zirconate titanate ceramics
Special Collection:
Multicalorics
B. Asbani;
B. Asbani
1
LPMC, Université de Picardie Jules Verne
, 33 rue Saint-Leu, 80039 Amiens Cédex, France
2
IMED-lab Université Cadi Ayyad
, BP 549, Marrakech, Morocco
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M. El Marssi;
M. El Marssi
1
LPMC, Université de Picardie Jules Verne
, 33 rue Saint-Leu, 80039 Amiens Cédex, France
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J.-L. Dellis
;
J.-L. Dellis
1
LPMC, Université de Picardie Jules Verne
, 33 rue Saint-Leu, 80039 Amiens Cédex, France
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A. Lahmar
;
A. Lahmar
1
LPMC, Université de Picardie Jules Verne
, 33 rue Saint-Leu, 80039 Amiens Cédex, France
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Y. Gagou;
Y. Gagou
1
LPMC, Université de Picardie Jules Verne
, 33 rue Saint-Leu, 80039 Amiens Cédex, France
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D. Mezzane;
D. Mezzane
2
IMED-lab Université Cadi Ayyad
, BP 549, Marrakech, Morocco
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M. Amjoud;
M. Amjoud
2
IMED-lab Université Cadi Ayyad
, BP 549, Marrakech, Morocco
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A. Alimoussa;
A. Alimoussa
2
IMED-lab Université Cadi Ayyad
, BP 549, Marrakech, Morocco
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Z. Kutnjak
;
Z. Kutnjak
3
Jozef Stefan Institute
, Jamova cesta 39, 1000 Ljubljana, Slovenia
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R. Pirc;
R. Pirc
3
Jozef Stefan Institute
, Jamova cesta 39, 1000 Ljubljana, Slovenia
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B. Rožič
B. Rožič
a)
3
Jozef Stefan Institute
, Jamova cesta 39, 1000 Ljubljana, Slovenia
a)Author to whom correspondence should be addressed: brigita.rozic@ijs.si
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a)Author to whom correspondence should be addressed: brigita.rozic@ijs.si
Note: This paper is part of the Special Topic on Multicalorics.
J. Appl. Phys. 127, 224101 (2020)
Article history
Received:
February 18 2020
Accepted:
May 25 2020
Citation
B. Asbani, M. El Marssi, J.-L. Dellis, A. Lahmar, Y. Gagou, D. Mezzane, M. Amjoud, A. Alimoussa, Z. Kutnjak, R. Pirc, B. Rožič; Electrocaloric response in lanthanum-modified lead zirconate titanate ceramics. J. Appl. Phys. 14 June 2020; 127 (22): 224101. https://doi.org/10.1063/5.0005038
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