Electrocaloric effect in Ba0.2Ca0.8Ti0.95Ge0.05O3 determined by a new pyroelectric method

被引：15

作者：

Asbani, B. ^{[1
]}

Dellis, J. -L. ^{[1
]}

Gagou, Y. ^{[1
]}

Kaddoussi, H. ^{[1
]}

Lahmar, A. ^{[1
]}

Amjoud, M. ^{[2
]}

Mezzane, D. ^{[2
]}

Kutnjak, Z. ^{[3
]}

El Marssi, M. ^{[1
]}

机构：

[1] Univ Picardie, Lab Phys Matiere Condensee, F-80039 Amiens, France

[2] FSTG Univ Cadi Ayyad, LMCN, Marrakech, Morocco

[3] Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

EPL | 2015年 / 111卷 / 05期

关键词：

ROOM-TEMPERATURE; THIN-FILM; CERAMICS;

D O I：

10.1209/0295-5075/111/57008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The present letter explores the electrocaloric effect (ECE) in the lead-free oxide Ba0.8Ca0.2Ti0.95Ge0.05O3 ceramics (BCTG). The electrocaloric responsivity xi = (dT/dE) was determined by two different methods using the Maxwell relationship xi alpha (partial derivative P/partial derivative T)(E). In a first well-known indirect method, P-E hysteresis loops were measured in a wide temperature range from which the pyroelectric coefficient pE = (partial derivative P/partial derivative T)(E) and thus. were determined by derivation of P(T, E) data. In the second novel method the pyroelectric coefficient pE and consequently the electrocaloric responsivity. were determined by direct measurements of the pyroelectric currents under different applied electric fields. Within the experimental error, good agreement was obtained between two methods with xi = 0.18 +/- 0.05.10(-6) K.m.V-1 at about 410 K. Copyright (C) EPLA, 2015

引用

页数：5

共 28 条

[1] Lead-free Ba0.8Ca0.2(ZrxTi1-x)O3 ceramics with large electrocaloric effect [J].

Asbani, B. ;

Dellis, J. -L. ;

Lahmar, A. ;

Courty, M. ;

Amjoud, M. ;

Gagou, Y. ;

Djellab, K. ;

Mezzane, D. ;

Kutnjak, Z. ;

El Marssi, M. .

APPLIED PHYSICS LETTERS, 2015, 106 (04)

[2] Structural and dielectric properties of a new lead-free ferroelectric Ba0.8Ca0.2Ti0.8Ge0.2O3 ceramics [J].

Asbani, B. ;

Lahmar, A. ;

Amjoud, M. ;

Dellis, J. -L. ;

Gagou, Y. ;

Mezzane, D. ;

El Marssi, M. .

SUPERLATTICES AND MICROSTRUCTURES, 2014, 71 :162-167

[3] Optimized electrocaloric refrigeration capacity in lead-free (1-x)BaZr0.2Ti0.8O3-xBa0.7Ca0.3TiO3 ceramics [J].

Bai, Yang ;

Han, Xi ;

Qiao, Lijie .

APPLIED PHYSICS LETTERS, 2013, 102 (25)

[4] Abnormal electrocaloric effect of Na0.5Bi0.5TiO3-BaTiO3 lead-free ferroelectric ceramics above room temperature [J].

Bai, Yang ;

Zheng, Guang-Ping ;

Shi, San-Qiang .

MATERIALS RESEARCH BULLETIN, 2011, 46 (11) :1866-1869

[5] Reversible and irreversible polarization processes in ferroelectric ceramics and thin films [J].

Bolten, D ;

Böttger, U ;

Waser, R .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (03) :1735-1742

[6] PYROELECTRIC COEFFICIENT DIRECT MEASUREMENT TECHNIQUE AND APPLICATION TO A NSEC RESPONSE TIME DETECTOR [J].

BYER, RL ;

ROUNDY, CB .

IEEE TRANSACTIONS ON SONICS AND ULTRASONICS, 1972, SU19 (02) :333-&

[7]

Correia T., 2014, ELECT MAT, V34

[8] PST thin films for electrocaloric coolers [J].

Correia, T. M. ;

Kar-Narayan, S. ;

Young, J. S. ;

Scott, J. F. ;

Mathur, N. D. ;

Whatmore, R. W. ;

Zhang, Q. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2011, 44 (16)

[9] Room temperature electro-caloric effect in lead-free Ba(Zr0.1Ti0.9)1-xSnxO3 (x=0, x=0.075) ceramics [J].

Kaddoussi, H. ;

Gagou, Y. ;

Lahmar, A. ;

Belhadi, J. ;

Allouche, B. ;

Dellis, J. -L. ;

Courty, M. ;

Khemakhem, H. ;

El Marssi, M. .

SOLID STATE COMMUNICATIONS, 2015, 201 :64-67

[10]

Kutnjak Z., 1999, ELECT EFFECT THEORY

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