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Ferroelectrics Volume 487, 2015 - Issue 1: Proceedings of The 9th Asian Meeting on Ferroelectrics (AMF-9) and The 9th Asian Meeting on Electroceramics (AMEC-9) (AMF-AMEC-2014)
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Original Articles

Giant Dielectric Response and Relaxor Behaviors in Ba0.4Sr0.6(Fe0.5Nb0.5)O3 Ceramics

Yongfei WenSchool of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an710021, China
,
Zhuo WangSchool of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an710021, ChinaCorrespondence[email protected]
,
Liangliang ZhangSchool of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an710021, China
&
Haijuan LiSchool of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an710021, China
Pages 34-39 | Received 26 Oct 2014, Accepted 15 Feb 2015, Published online: 23 Dec 2015
 
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Abstract

Dielectric relaxations of Ba0.4Sr0.6(Fe0.5Nb0.5)O3 (BSFN) ceramics were investigated. Two dielectric relaxations with strong frequency dispersion and following the Arrhenius law were detected in low and high temperature ranges, respectively. The low temperature dielectric relaxation was proposed to originate from the electronic ferroelectricity and the high temperature dielectric relaxation was attributed to the defect ordering. The formation mechanism of the giant dielectric constant step was just a competing balance result of the low- and high-temperature dielectric relaxations.

Funding

The present work was supported by National Science Foundation of China (51372144, 51102159), the Special Foundation of Educational Department of Shaanxi Province (14JK1080), the Scientific Research Foundation for PhD (BJ10-16), the Academic Backbones Cultivation Program (XS11-02) and Graduate Innovation Fund of Shaanxi University of Science and Technology.

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