Abstract
Devitrification of Fe–Si–B melt-spun ribbons by laser annealing, instead of typical furnace-annealing, led to substantially refined α-Fe(Si) nanocrystals nucleating within the amorphous matrix with a large number density of nucleation sites. This microstructural refinement due to laser devitrification leads to substantially improved soft magnetic properties with a drastic, 25 times, reduction in the coercivity, while maintaining the saturation magnetization values comparable to the furnace-annealed condition, making laser-annealing a very attractive devitrification route for these soft magnetic alloys.
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