Abstract
Abstract This work investigated the microstructure, magnetic properties, and crystallization kinetics of the as-spun and annealed alloy ribbons of (Fe40−x Co x Ni40Si6.33B12.66Cu1) 0.97Nb0.03, where x = 0, 6, 7, 8, 9, prepared using the melt-spinning method. The results show that adding a moderate amount of Co can improve the glass forming ability (GFA), the first peak crystallization temperature, and thermal stability of the as-spun alloy ribbons. With x = 7, the two-stage crystallization temperature interval ΔTx = 90 exhibits optimal thermal stability, and the alloy annealed at 673 K for 10 minutes shows the favorable combined magnetic properties, with H c = 0.12 A/m, M s = 88.7 A⋅m2/kg, and μ e = 13800. The magnetic domain results show that annealing removes numerous pinning points in the magnetic domains of the alloy ribbons, making the domain walls smoother and effectively reducing the pinning effect.
Published Version
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