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Magnetic materials are crucial energy materials that are widely used in day-to-day life. Therefore, the development and study of high-performance magnetic materials are of great significance. In this study, the magnetic materials Co66.6Si33.4, Co60.6X6Si33.4 (X = Fe, Mn), and Co60.6Fe3Mn3Si33.4 were prepared via the ball milling and sintering processes. Their crystal structures, electrical conductivity, and magnetic properties were investigated via the X-ray diffraction analysis and by using a resistivity tester, vibrating sample magnetometer, and vector network analyser. The X-ray diffraction analysis revealed that a single phase of Co66.6Si33.4 and its doped alloy powders were successfully obtained. The electrical conductivities of Mn6Co60.6Si33.4 and Fe3Mn3Co60.6Si33.4 were measured using a resistivity tester. The results indicate that Mn doping and Fe and Mn Co-doping enhanced the electrical conductivity of Co66.6Si33.4. The magnetic properties of Co66.6Si33.4 were determined using a vibrating sample magnetometer. We observed that the magnetic properties were enhanced after doping. Co60.6Fe3Mn3Si33.4 exhibited excellent magnetic properties. Further, its permeability was determined using a vector network analyser. At a low frequency, the u’ and u” values of Co60.6Fe6Si33.4 and Co60.6Fe3Mn3Si33.4 were enhanced; whereas, at a high frequency, after doping, the u’ and u” values changed only slightly. This study can be used as a basis for future studies on magnetic functional materials.

Effects of Fe, Mn Individual Doping and (Fe, Mn) Co-Doping on Ferromagnetic Properties of Co2Si Powders