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溶胶-凝胶法制备了Bi1-xBaxFe1-yMnyO3陶瓷样品,研究掺杂对BiFeO3(BFO)的微观结构、磁性及介电性能的影响.XRD表明Bi1-xBaxFe1-yMnyO3为单相菱方钙钛矿结构,BiFeO3的磁滞回线表明其在室温具有反铁磁性(弱铁磁性),Ba和Mn掺杂后使体系由反铁磁性向铁磁性转变.BiFeO3和Bi0.9Ba0.1FeO3介电常数随温度变化曲线在200和230K下均出现转变点,但掺杂Mn时体系转变点消失.当外加磁场时,介电常数的测量表明Ba和Mn掺杂能够增大BFO的磁介电效应.

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