High coercivity in Sm5Fe17 melt-spun ribbon

Sm–Fe binary alloy with the hard magnetic Sm5Fe17 phase was produced by melt-spinning followed by heat treatment. The magnetic properties of the Sm–Fe melt-spun ribbon depended on the annealing temperature. The highest coercivity, iHc = 1.90 MA m−1, was obtained by annealing the Sm–Fe melt-spun ribbon for 1 h at 923 K. The coercivity of the Sm5Fe17 melt-spun ribbon was attributed to the grain size of the hard magnetic Sm5Fe17 phase.