层状前体法制备锰掺杂钴铁氧体的性能

Properties of Mn-doped Cobalt Ferrite Prepared by Layered Precursors Method

采用层状前体法制备了锰掺杂钴铁氧体Co1-xMnxFe2O4(x分别取0.1,0.2,0.3,0.4),用X射线衍射仪分析了它的物相与结构,用振动样品磁强计测试了它的磁性能,采用自制设备研究了其对巴克豪森信号的接收特性。结果表明:该铁氧体均以单相尖晶石结构存在;掺锰降低了材料的矫顽力,且锰含量越大,矫顽力越小;当x=0.1时材料的饱和磁化强度比钴铁氧体的要大,之后其值随锰含量的增加逐渐减小;Co1-xMnxFe2O4尖晶石铁氧体材料有望作为接收器件应用于巴克豪森磁弹传感器。

A series of Co1-xMn=Fe2O4（x can be 0. 1, 0. 2, 0. 3 or 0. 4） ferrite were prepared by layered double hydroxides （LDHS）. The structure and magnetic properties were analyzed by means of XRD and vibrating sample magnetometer. The reception properties were tested by self-made sensor in which the calcination samples worked as receiving core. The results show that all samples existed with single-phase spinel structure. Mn-doped materials reduced the coercive force which decreased with increasing Mn content. Material with x=0. 1 had a larger saturation magnetization value than that of cobalt ferrite, and the value decreased with increasing Mn content. Co1-xMn=Fe2O4 is exPected to be used in Barkhausen magneto-elastic sensors as receiving magnetic core.