Effect of cobalt doping on structural and magnetic characterization of nanocrystalline Fe72−xCoxCr28 (10 < X < 22) alloys

Abstract In this study, the effect of substitution of Co with Fe on structural and magnetic characteristics of nanocrystalline Fe-Co-Cr alloys has been investigated. In this regard, different combinations of Fe, Co and Cr elements with nominal composition of Fe 72−x Co x Cr 28 (10  1 and α 2 spinodal phases) has been formed. The coercivity and saturation of magnetization of formed alloys were in the range of 110–187 Oe and 150–175 emu/g, respectively. The coercivity of Fe 72−x Co x Cr 28 (10  1 and α 2 phases in this composition. The formed Fe-Co-Cr α-phase solid solutions were not stable and transformed to σ and γ phases during annealing process at temperatures higher than 600 °C. The formation of non-magnetic σ and γ phases had destructive effect on magnetic properties of prepared samples with different composition.