Multiferroic and dielectric properties of Bi4LaTi3FeO15 ceramics. (July 2015)

• Record Type: Journal Article
• Authors: Ti, Ruixia; Huang, Fengzhen; Zhu, Weili; He, Ju; Xu, Tingting; Yue, Chen; Zhao, Jing; Lu, Xiaomei; Zhu, Jinsong
• Is Part Of: Ceramics international. Volume 41(2015)Supplement 1
• Page Start: S453
• Page End: S457
• Publication Date: 2015-07
• Subjects: Multiferroics -- Ferroelectrics -- Dielectric relaxation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.03.157
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Single phase Bi4 LaTi3 FeO15 ceramics with a four-layered Aurivillius structure were synthesized by successfully inserting LaFeO3 into Bi4 Ti3 O12 matrix, and their structural, multiferroic and dielectric properties were investigated. Typical ferroelectric behavior with remnant polarization (2 P r ) of about 12 μC/cm 2, large dielectric constant, small dielectric loss and a weak ferromagnetic behavior are obtained simultaneously at room temperature. As a result, possible magnetoelectric coupling effect is obtained near the ferromagnetic Curie temperature. Meanwhile, the weak ferromagnetism can be enhanced at lower temperature, and thus a larger saturation magnetization of about 1.2 emu/g is obtained at 5 K. In addition, two sets of dielectric relaxation are observed and discussed based on defect relaxation theory.