采用层状前体法制备了锰掺杂钴铁氧体Co<,1-x>MnxFe2O4(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;Co<,1-x>MnxFe2O4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-xMnx 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-xMnxFe2O4 is expected to be used in Barkhausen magneto-elastic sensors as receiving magnetic core.
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