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Phase evolution and room temperature ferroelectric and magnetic properties of Fe-doped BaTiO3 ceramics

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【作者】 邱深玉； 李旺； 刘宇； 刘桂华； 吴毅强； 陈楠；

【Author】 QIU Shen-yu1,LI Wang2,LIU Yu2,LIU Gui-hua2,WU Yi-qiang 3,CHEN Nan2 1.Department of Science,Nanchang Institute of Technology,Nanchang 330099,China;2.School of Materials Science and Engineering,Nanchang University,Nanchang 330031,China;3.Department of Electronics,Nanchang University,Nanchang 330031,China

【机构】 Department of Science,Nanchang Institute of Technology； School of Materials Science and Engineering,Nanchang University； Department of Electronics,Nanchang University；

【摘要】 To make the ferroelectric BaTiO3 possess ferromagnetism simultaneously,magnetic Fe was doped into BaTiO3 ceramics at doping levels up to 10%(molar fraction).Both tetragonal and hexagonal phases coexisted in the Fe-doped BaTiO3 ceramics except at 1% doping level.X-ray diffraction analysis indicated that higher doping level of Fe,higher sintering temperature and longer sintering time promoted the formation of hexagonal phases in Fe-doped BaTiO3 ceramics.Ferroelectricity was observed in all samples at room temperature,but it was greatly depressed by Fe doping.Except at doping level of 1%,room-temperature ferromagnetism was observed in the BaTiO3 ceramics.The dependence of the saturation magnetization and coercivities of the Fe-doped BaTiO3 ceramics on doping level was systematically studied.Both the saturation magnetization and magnetic coercivities were found to be dependent on the doping level as well as the fraction of the hexagonal phase in the ceramics.

【Abstract】 To make the ferroelectric BaTiO3 possess ferromagnetism simultaneously,magnetic Fe was doped into BaTiO3 ceramics at doping levels up to 10%(molar fraction).Both tetragonal and hexagonal phases coexisted in the Fe-doped BaTiO3 ceramics except at 1% doping level.X-ray diffraction analysis indicated that higher doping level of Fe,higher sintering temperature and longer sintering time promoted the formation of hexagonal phases in Fe-doped BaTiO3 ceramics.Ferroelectricity was observed in all samples at room temperature,but it was greatly depressed by Fe doping.Except at doping level of 1%,room-temperature ferromagnetism was observed in the BaTiO3 ceramics.The dependence of the saturation magnetization and coercivities of the Fe-doped BaTiO3 ceramics on doping level was systematically studied.Both the saturation magnetization and magnetic coercivities were found to be dependent on the doping level as well as the fraction of the hexagonal phase in the ceramics.

【关键词】 Fe-doped BaTiO3 ceramics； phase evolution； ferroelectricity； magnetism；
【Key words】 Fe-doped BaTiO3 ceramics； phase evolution； ferroelectricity； magnetism；
【基金】 Project(60661001) supported by the National Natural Science Foundation of China
  • 【文献出处】 Transactions of Nonferrous Metals Society of China ,中国有色金属学报(英文版) , 编辑部邮箱 ,2010年10期
  • 【分类号】TQ174.1
  • 【被引频次】9
  • 【下载频次】62
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