Nanocrystalline soft magnetic ribbon with α″-Fe16N2 nanocrystallites embedded in amorphous matrix

Abstract A nanostructure with α ″-Fe 16 N 2 nanocrystallites embedded in an amorphous matrix was prepared by annealing Fe 92 B 8 amorphous alloy in a NH 3 +H 2 gas mixture stream with subsequent quenching and annealing. The average grain size and the volume fraction of the α ″-Fe 16 N 2 phase are found to be 18 nm and 54%, respectively. The prepared sample exhibits a saturation magnetization of 2.35 T, a coercive force of 11.4 A/m, an initial permeability of 9.1×10 4 and a relaxation frequency of 4.1×10 4 Hz.