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Ferroelectrics Letters Section Volume 43, 2015 - Issue 4-6
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Original Articles

Dispersion behaviors of Gaussian-type distribution of Curie temperature in relaxor ferroelectrics

Wan Q. CaoMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional Material, Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, China;School of Materials Science and Engineering, Hubei University, Wuhan430062, ChinaCorrespondence[email protected] [email protected]
,
Chao ZhouMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional Material, Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, China;School of Materials Science and Engineering, Hubei University, Wuhan430062, China
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Rui K. PanMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional Material, Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, China;School of Materials Science and Engineering, Hubei University, Wuhan430062, China
&
Ya J. QiMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional Material, Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University, Wuhan, China;School of Materials Science and Engineering, Hubei University, Wuhan430062, China
Pages 71-76 | Accepted 16 Oct 2015, Published online: 02 Sep 2016
 
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ABSTRACT

When the contributions of dipole and soften vibration mode are assigned to a complex impermeability and a real impermeability, respectively, the total complex permeability with frequency can be derived to modify the classical Landau-Devonshire theory. In a gaussian distribution and a skewed gaussian distribution of Curie temperature of second-order phase transition, the functions derived have the form of dispersion behavior of relaxor ferroelectrics. By comparing with experiment result, slight deviations appear on the two sides of peak of permittivity for the gaussian distribution, and improved by the skewed gaussian distribution. The relevant problems to be solved are proposed.

Funding

This work was supported by the Natural Science Foundation of China (Grant No. 51272072, 51472078).

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