Soft magnetic properties in Fe84-xB10C6Cux nanocrystalline alloys

The dependence of Cu addition on magnetic properties of Fe84-xB10C6Cux nanocrystalline alloys prepared by annealing the melt-spun amorphous ribbons was investigated. It was found that the coercivity (H-c) of the nanocrystalline Fe84-xB10C6Cux alloys decreased with increasing Cu addition and exhibited a minimum value with composition of x=1 after appropriate annealing, while the saturation magnetic flux density (B-s) shows an increasing trend owing to the increasing volume fraction of nanocrystalline phase. And the alloy with composition of x=1 exhibits excellent magnetic properties, i.e., high B-s of 1.78 T, low H-c of 5 A/m and low core loss (P) of 0.34 W/kg at 1 T and 50 Hz. (C) 2012 Elsevier B.V. All rights reserved.