Effect of magnetic annealing on magnetization of BiFeO₃ ceramics

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• 作者：Wanju Luo^a ; ^{wanjuluo@msn.com} ; Shuxia Zhang^a ; Dongliang Wang^a ; Yanwei Ma^a ; Fangwei Wang^b ; Kazuo Watanabe^c
• 关键词：Multiferroic material ; BiFeO3 ; Magnetic annealing ; Magnetization
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2012
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：August, 2012
• 卷：324
• 期：16
• 页码：2458-2462
• 文件大小：981 K

摘要

The effect of magnetic annealing treatment on the magnetization of multiferroic BiFeO₃ was studied systematically. A series of pelletized nano-sized BiFeO₃ powders were annealed at high temperature under different magnetic fields. Typical ferromagnetic hysteresis loops were obtained at room temperature of the ceramics which were derived from ferromagnetic BiFeO₃ precursors. On the other hand, antiferromagnetic behaviors were observed in other samples synthesized from nonmagnetic precursors. The enhanced magnetic properties were ascribed to the magnetic anisotropy which was induced by the strong magnetic fields. This work indicates that the strong magnetic annealing method is an alternative approach to tuning the magnetic properties of high performance multiferroic materials with canted antiferromagnetic ordering.