Effects of Fe, Mn Individual Doping and (Fe, Mn) Co-Doping on Ferromagnetic Properties of Co(2)Si Powders

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 Co [Formula: see text] Si [Formula: see text] , Co [Formula: see text] X [Formula: see text] Si [Formula: see text] (X = Fe, Mn), and Co [Formula: see text] Fe [Formula: see text] Mn [Formula: see text] Si [Formula: see text] 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 Co [Formula: see text] Si [Formula: see text] and its doped alloy powders were successfully obtained. The electrical conductivities of Mn [Formula: see text] Co [Formula: see text] Si [Formula: see text] and Fe [Formula: see text] Mn [Formula: see text] Co [Formula: see text] Si [Formula: see text] were measured using a resistivity tester. The results indicate that Mn doping and Fe and Mn Co-doping enhanced the electrical conductivity of Co [Formula: see text] Si [Formula: see text]. The magnetic properties of Co [Formula: see text] Si [Formula: see text] were determined using a vibrating sample magnetometer. We observed that the magnetic properties were enhanced after doping. Co [Formula: see text] Fe [Formula: see text] Mn [Formula: see text] Si [Formula: see text] exhibited excellent magnetic properties. Further, its permeability was determined using a vector network analyser. At a low frequency, the u’ and u” values of Co [Formula: see text] Fe [Formula: see text] Si [Formula: see text] and Co [Formula: see text] Fe [Formula: see text] Mn [Formula: see text] Si [Formula: see text] 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.