Solid solutions of (1 − x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 promise to exhibit a large electrocaloric effect (ECE), because their Curie temperature and a multiphase coexistence region lie near room temperature. We report on direct measurements of the electrocaloric effect in bulk ceramics 0.65Ba(Zr0.2Ti0.8)O3-0.35(Ba0.7Ca0.3)TiO3 using a modified differential scanning calorimeter. The adiabatic temperature change reaches a value of ΔTEC = 0.33 K at ∼65 °C under an electric field of 20 kV/cm. It remains sizeable in a broad temperature interval above this temperature. Direct measurements of the ECE proved that the temperature change exceeds the indirect estimates derived from Maxwell relations by about ∼50%. The discrepancy is attributed to the relaxor character of this material.
References
1.
M.
Valant
, Prog. Mater. Sci.
57
, 980
(2012
).2.
Electrocaloric Materials: New Generation of Coolers
, edited by T.
Correia
and Q.
Zhang
(Springer
, Berlin
, Heidelber, 2014
).3.
R.
Blinc
, Advanced Ferroelectricity
(Oxford University Press
, 2011
), pp. 203
–214
.4.
G.
Sebald
, L.
Seveyrat
, D.
Guyomar
, L.
Lebrun
, B.
Guiffard
, and S.
Pruvost
, J. Appl. Phys.
100
, 124112
(2006
).5.
S. G.
Lu
and Q.
Zhang
, J. Adv. Dielectr.
2
, 1230011
(2012
).6.
A. S.
Mischenko
, Q.
Zhang
, J. F.
Scott
, R. W.
Whatmore
, and N. D.
Mathur
, Science
311
, 1270
(2006
).7.
B.
Rožič
, H.
Uršič
, J.
Holc
, M.
Kosec
, and Z.
Kutnjak
, Integr. Ferroelectr.
140
, 161
(2012
).8.
Y.
Liu
, I. C.
Infante
, X.
Lou
, D. C.
Lupascu
, and B.
Dkhil
, Appl. Phys. Lett.
104
, 012907
(2014
).9.
T. M.
Correia
, S.
Kar-Narayan
, J. S.
Young
, J. F.
Scott
, N. D.
Mathur
, R. W.
Whatmore
, and Q.
Zhang
, J. Phys. D: Appl. Phys.
44
, 165407
(2011
).10.
S. G.
Lu
, B.
Rožič
, Q. M.
Zhang
, Z.
Kutnjak
, X.
Li
, E.
Furman
, Lee J.
Gorny
, M.
Lin
, B.
Malič
, M.
Kosec
, R.
Blinc
, and R.
Pirc
, Appl. Phys. Lett.
97
, 162904
(2010
).11.
S. G.
Lu
, B.
Rožič
, Q. M.
Zhang
, Z.
Kutnjak
, R.
Pirc
, M.
Lin
, X.
Li
, and L.
Gorny
, Appl. Phys. Lett.
97
, 202901
(2010
).12.
P. F.
Liu
, J. L.
Wang
, X. J.
Meng
, J.
Yang
, B.
Dkhil
, and J. H.
Chu
, New J. Phys.
12
, 023035
(2010
).13.
X. Q.
Liu
, T. T.
Chen
, Y. J.
Wu
, and X. M.
Chen
, J. Am. Ceram. Soc.
96
, 1021
(2013
).14.
Z.
Luo
, D.
Zhang
, Y.
Liu
, D.
Zhou
, Y.
Yao
, C.
Liu
, B.
Dkhil
, X.
Ren
, and X.
Lou
, Appl. Phys. Lett.
105
, 102904
(2014
).15.
L.
Luo
, H.
Chen
, Y.
Zhu
, W.
Li
, H.
Luo
, and Y.
Zhang
, J. Alloys Compd.
509
, 8149
(2011
).16.
M.
Valant
, L. J.
Dunne
, A.-K.
Axelsson
, N. McN.
Alford
, G.
Manos
, J.
Peräntie
, J.
Hagberg
, H.
Jantunen
, and A.
Dabkowski
, Phys. Rev. B
81
, 214110
(2010
).17.
X.
Moya
, E.
Stern-Taulats
, S.
Grossley
, D.
Gonzales-Alonso
, S.
Kar-Narayan
, A.
Planes
, L.
Manosa
, and N. D.
Mathur
, Adv. Mater.
25
, 1360
(2013
).18.
Z.
Feng
, D.
Shi
, and S.
Dou
, Solid State Commun.
151
, 123
(2011
).19.
R.
Chukka
, J. W.
Cheah
, Z.
Chen
, P.
Yang
, S.
Shannigrahi
, J.
Wang
, and L.
Chen
, Appl. Phys. Lett.
98
, 242902
(2011
).20.
Y.
He
, X. M.
Li
, X. D.
Gao
, X.
Leng
, and W.
Wang
, Funct. Mater. Lett.
4
, 45
(2011
).21.
EU-Directive 2011/65/EU
, “Restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS)
,” Off. J. Eur. Union
L 174
, 88
(2011
).22.
W.
Liu
and X.
Ren
, Phys. Rev. Lett.
103
, 257602
(2009
).23.
D. R. J.
Brandt
, M.
Acosta
, J.
Koruza
, and K. G.
Weber
, J. Appl. Phys.
115
, 204107
(2014
).24.
M.
Acosta
, N.
Novak
, W.
Jo
, and J.
Rödel
, Acta Mater.
80
, 48
(2014
).25.
D. S.
Keeble
, F.
Benabdallah
, P. A.
Thomas
, M.
Maglione
, and J.
Kreisel
, Appl. Phys. Lett.
102
, 092903
(2013
).26.
G.
Singh
, I.
Bhaumik
, S.
Ganesamoorthy
, R.
Bhatt
, A. K.
Karnai
, V. S.
Tiwari
, and P. K.
Gupta
, Appl. Phys. Lett.
102
, 082902
(2013
).27.
Y.
Bai
, X.
Han
, and L.
Qiao
, Appl. Phys. Lett.
102
, 252904
(2013
).28.
G.
Singh
, V. S.
Tiwari
, and P. K.
Gupta
, Appl. Phys. Lett.
103
, 202903
(2013
).29.
J.
Wang
, T.
Yang
, S.
Chen
, G.
Li
, Q.
Zhang
, and X.
Yao
, J. Alloys Compd.
550
, 561
(2013
).30.
V. V.
Shvartsman
, J.
Zhai
, and W.
Kleemann
, Ferroelectrics
379
, 301
(2009
).31.
A. A.
Bokov
and Z.-G.
Ye
, J. Mater. Sci.
41
, 31
(2006
).32.
Y. P.
Shi
and A. K.
Soh
, Acta Mater.
59
, 5574
(2011
).33.
J.
Peräntie
, H. N.
Tailor
, J.
Hagberg
, H.
Jantunen
, and Z.-G.
Ye
, J. Appl. Phys.
114
, 174105
(2013
).34.
N.
Novak
, Z.
Kutnjak
, and R.
Pirc
, EPL
103
, 47001
(2013
).35.
M.
Zakhozheva
, L. A.
Schmitt
, M.
Acosta
, J.
Rödel
, and H.-J.
Kleebe
, Appl. Phys. Lett.
105
, 112904
(2014
).36.
J.
Gao
, D.
Xue
, Y.
Wang
, D.
Wang
, L
Zhang
, X.
Wu
, S.
Guo
, H.
Bao
, C.
Zhou
, W.
Liu
, S.
Hou
, G.
Xiao
, and X.
Ren
, Appl. Phys. Lett.
99
, 092901
(2011
).37.
X.-S.
Qian
, H.-J.
Ye
, Y.-T.
Zhang
, H.
Gu
, X.
Li
, C. A.
Randall
, and Q. M.
Zhang
, Adv. Funct. Mater.
24
, 1300
(2014
).© 2015 AIP Publishing LLC.
2015
AIP Publishing LLC
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