采用溶胶-凝胶方法制备了xCoAl0.2Fe1.8O4+(1-x)BaTiO3纳米磁电复合材料.XRD图谱分析表明烧结后的样品是复合的钙钛矿(BaTiO3)和尖晶石(CoAl0.2Fe1.8O4)结构,SEM图像显示复合材料颗粒大小均匀.用磁滞回线研究了材料的磁性能,并通过Koops双层异质结构模型解释了复合材料的介电频散现象.测量结果表明:0.20CoAl0.2Fe1.8O4+0.80BaTiO3的样品在偏置磁场为1.35×105A/m时表现出最大的磁电电压系数1.075×10-2V/A.
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