Magnetic Properties of High-$B_{s}$ Fe84.3B6P9Cu0.7 Nanocrystalline Alloy Powder

In this study, we investigated an Fe-B-P-Cu system nanocrystalline alloy with both high saturation magnetic flux density and low coercivity. In particular, we manufactured as-quenched Fe 84.3 B 6 P 9 Cu 0.7 alloy powder with a smooth and spherical surface. After annealing, this powder showed a nanocrystalline structure, low coercivity, and saturation magnetic flux density of 1.68 T. These magnetic properties are excellent compared to those of conventional powders. Thus, Fe 84.3 B 6 P 9 Cu 0.7 nanocrystalline alloy powder can be used to produce superior inductors with high saturation magnetic flux density as well as low coercivity.