Multiferroic and dielectric properties of Bi4LaTi3FeO15 ceramics
Multiferroic and dielectric properties of Bi4LaTi3FeO15 ceramics
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DOI：
10.1016/j.ceramint.2015.03.157
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发表时间：
2015-07
影响因子：
5.2
通讯作者：
R. Ti;F. Huang;Weili Zhu;Ju He;Tingting Xu;Chen Yue;J. Zhao;Xiaomei Lu;Jinsong Zhu
中科院分区：
文献类型：
--
作者：
R. Ti;F. Huang;Weili Zhu;Ju He;Tingting Xu;Chen Yue;J. Zhao;Xiaomei Lu;Jinsong Zhu
Single phase Bi4LaTi3FeO15ceramics with a four-layered Aurivillius structure were synthesized by successfully inserting LaFeO3into Bi4Ti3O12matrix, and their structural, multiferroic and dielectric properties were investigated. Typical ferroelectric behavior with remnant polarization (2Pr) of about 12 μC/cm2, 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.
