Dielectric behavior and ac conductivity in Aurivillius Bi₄Ti₃O₁₂ doped by antiferromagnetic BiFeO₃

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• 作者：M.S. Wu ; Z.M. Tian ; S.L. Yuan ; ^{yuansl@hust.edu.cn} ; H.N. Duan ; Y. Qiu
• 关键词：Ceramics ; Microstructure ; Perovskite ; Dielectric ; Ferroelectric
• 刊名：Physics Letters A
• 出版年：2012
• 期刊代码：57_03759601
• 类别：ph
• 出版时间：4 June, 2012
• 卷：376
• 期：28-29
• 页码：2062-2066
• 文件大小：710 K

摘要

Bi₅Ti₃FeO₁₅ ceramics were synthesized by the solid state reaction. XRD analysis shows a single phase perovskite structure with no impurities identified. Two obvious dielectric anomalies around 1007 and 1090 K were exhibited by this material, indicating that there are two phase transitions. While no peak was found in the curve. In addition, the conduction loss activation energies calculated at 476-639 K, 652-966 K, and 980-1095 K are 0.156, 0.262, and 0.707 eV, respectively. Polarization versus electric field hysteresis loops associated with of 6.08 渭C/cm² and of 59 kV/cm were obtained.