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Ferroelectrics Letters Section Volume 45, 2018 - Issue 4-6
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Articles

Exothermic effect of entropy change in second-order phase transition ferroelectrics

Shao H. QuHubei province key laboratory of low dimension photoelectric material and device, and School of Physics and Electronic Engineering, Hubei University of Arts and Science, XiangYang, 441053, China; View further author information
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Ming MeiHubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory of Ministry of Education for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, ChinaView further author information
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Wan Q. CaoHubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory of Ministry of Education for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, ChinaCorrespondence[email protected]@qq.com
View further author information
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Rui K. PanHubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory of Ministry of Education for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, ChinaView further author information
,
Ya J. QiHubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory of Ministry of Education for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, ChinaView further author information
,
Lei ZhangHubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory of Ministry of Education for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, ChinaView further author information
&
Xun Z. ShangHubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory of Ministry of Education for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, ChinaView further author information
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Pages 66-75 | Received 24 Dec 2017, Accepted 10 Oct 2018, Published online: 02 Jun 2019
 
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Abstract

Exothermic effect of entropy change by dipole orintation upon E in T-C second order phase transition ferroelectrics is modeled with statistic method. Formula of entropy change and temperature change were derived, showing sharp drop of entropy in higher temperature for higher E, exothermic peak shifts to high temperature with E, and 180° turning of dipole with a critical electric field prevails entropy change in ferroelectric phase, while 180° turning dominates entropy change in paraelectric phase. The results of numerical simulation can explain regulation of heating effect of the ferroelectrics. Morphotropic phase boundary will possess giant exothermic effect in principle.

Additional information

Funding

The present paper was supported by National Natural Science Foundation of China (Grant No. 51472078 and 51472079) and partially supported by Hubei Provincial Collaborative Innovation Center for Optoelectronics.

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