采用共沉淀法合成制备了多铁性体BiMn2O5,对其进行了物相分析和形貌表征,表征分析了它的磁学和电学性能,并系统描述了BiMn2O5的磁结构.实验表明:在pH=ll的共沉淀条件下制备的前驱体微粉,经800℃焙烧后可得到纯相的BiMn2O5粉体,其颗粒分布均匀、形貌完整且粒径在100 nm左右.文章测量得到BiMn2O5在室温下1 MHz时介电常数εr=41.6和介电损耗tarδ=0.336,并通过SQUID检测其磁相转变温度为42 K(TN =39～42K),得出有效磁矩μeff=6.72μB,在5K时测得BiMn2O5的磁滞回线,显示其矫顽力高达6000 Oe,与之前研究相比有很大提升.
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