Composition Dependence of Electrocaloric Effect in (1-x)Pb(Mg1/3Nb2/3)O3 -xPbTiO3 Single Crystals

被引：2
|
作者：
Qiu Jian-Hua [1 ,2 ,3 ]
Wang Xiu-Qin [1 ,2 ,3 ]
Yuan Ning-Yi [1 ,3 ,4 ]
Ding Jian-Ning [1 ,2 ,3 ,4 ]
机构：
[1] Changzhou Univ, Ctr Low Dimens Mat Micronano Devices & Syst, Changzhou 213164, Peoples R China
[2] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China
[3] Changzhou Univ, Jiangsu Key Lab Photovolat Engn Sci, Changzhou 213164, Peoples R China
[4] Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolat Sci & E, Changzhou 213164, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2015年 / 64卷 / 01期
关键词：
ferroelectrics; electrocaloric effect; adiabatic temperature change; ORIENTATION DEPENDENCE;
D O I：
10.1088/0253-6102/64/1/113
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Composition dependence of electrocaloric effect is investigated in (1 - x)Pb(Mg1/3Nb2/3)O-3 - xPbTiO(3) single crystals by using an eighth-order Landau Devonshire theory. The applied electric field along [001] direction reduces the ferroelectric-ferroelectric phase transition temperatures, but increases the Curie temperatures. The electrocaloric coefficients of tetragonal phase are much larger than that of rhombohedral and monoclinic phase. A negative electrocaloric effect is observed near the M-C-T phase transition in 0.69Pb(Mg1/3Nb2/3)O-3-0.31PbTiO(3) single crystal. The application of a strong enough electric field results in a high adiabatic temperature change over a broad range of temperature. Therefore, it would be useful to construct a solid state cooling cycle over a broad temperature range for practical applications.
引用
收藏
页码：113 / 118
页数：6
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