Effects of ambient gasses on the magnetic properties of Fe84.8Zr3.4Nb3.4B7.4Cu1 nanocrystalline alloy

Abstract This paper described the influence of ambient gases (Ar and N 2 ) during the melt spinning process on thermal stability, microstructure and soft magnetic properties of the Fe 84.8 Zr 3.4 Nb 3.4 B 7.4 Cu 1 nanocrystalline alloy. Compare to the sample fabricated in Ar, the sample obtained from the amorphous precursor fabricated in N 2 shows low thermal stability, its microstructure exhibits strong texture and its lattice parameter increase. The ambient gases also have effect on the magnetic properties, the alloys fabricated in N 2 , shows lower B r / B s , low permeability and higher relaxation frequency.