摘要
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1.075×10-2 V/A.
Magnetoelectric nano-composites xCoAl0.2Fe1.8O4＋（1-x）BaTiO3 were prepared by Sol-Gel method. The presence of perovskite BaTiO3 and spinel CoAl0.2Fe1.8O4 in the sintered composites was proved by XRD patterns. SEM images showed that particle size of composite was uniform. The magnetic property of composites was tested by magnetic hysteresis loops and dispersion of dielectric constant was explained with Koops two layer inhomogeneous dielectric structure model. The maximum value of magnetoelectric voltage coefficient viz. 1.075 × 10^-2V/A wasobtained for 0.20CoAl0.2Fel.8O4＋0.80BaTiO3 composite at the DC magnetic bias field of 1.35×10^5A/m.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第11期1155-1158,共4页
Journal of Inorganic Materials
基金
国家自然科学基金(10974131)
上海市纳米专项基金(0952nm07100)~~
关键词
介电特性
磁特性
磁电电压系数
dielectric property
magnetic property
magnetoelectric voltage coefficient
