Effect of Co addition on nanocrystallization and soft magnetic properties of (Fe1−Co )73.5Cu1Nb3Si13.5B9 alloys

Abstract The effect of partial replacement of Fe by Co in (Fe 1− x Co x ) 73.5 Cu 1 Nb 3 Si 13.5 B 9 alloys ( x =0–0.8) on the nanocrystallization process and on the soft magnetic properties has been investigated. Crystallization process of amorphous alloys was examined by differential scanning calorimetry in order to determine the crystallization temperatures and enthalpies as a function of Co content. The measurements of coercivity, magnetic induction and magnetostriction were carried out at room temperature. It was found that the optimal annealing temperature decreases with the increase of Co content.