Orientation and phase transition dependence of the electrocaloric effect in 0.71PbMg1/3Nb2/3O3-0.29PbTiO3 single crystal
Orientation and phase transition dependence of the electrocaloric effect in 0.71PbMg1/3Nb2/3O3-0.29PbTiO3 single crystal
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0.71PbMg1/3Nb2/3O3-0.29PbTiO3 单晶中电热效应的取向和相变依赖性
DOI：
10.1063/1.4745185
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发表时间：
2012-08-06
影响因子：
4
通讯作者：
Luo, Haosu
中科院分区：
文献类型：
--
作者：
Luo, Laihui;Dietze, Matthias;Luo, Haosu
本文研究了< 111 >< 001 >0.71PbMg（1/3）Nb（2/3）O-3-0.29PbTiO（3）（0.71PMN-0.29PT）单晶的电热效应，着重研究了相变的影响及其与电场的关系。我们表明，晶体取向，更具体地说，在上述特定组合物中发生的复杂相变对最大ECE温度，Δ T-max，其峰值温度，T-EC，和Δ T（T）曲线的ECE峰的宽度有很大的影响。研究表明，通过选择0.71PMN-0.29PT晶向，可以实现ECE的调谐。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.4745185]
In this letter, the electrocaloric effect (ECE) of < 111 >- and < 001 >-oriented 0.71PbMg(1/3)Nb(2/3) O-3-0.29PbTiO(3) (0.71PMN-0.29PT) single crystals is investigated with emphasis on the effects of phase transitions and their dependence on electric field. We show that crystal orientation and more specifically the complex phase transitions taking place in the specific composition above have large effects on the maximum ECE temperature, Delta T-max, its peak temperature, T-EC, and the width of the ECE peak of the Delta T(T) curve. The investigation shows that ECE may be tuned by a proper choice of 0.71PMN-0.29PT crystal orientations. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4745185]