  Soft magnetic materials have low coercive fields and high permeability.
Recently, nanocrystalline alloys obtained using annealing amorphous alloys have
attracted much interest since nanocrystalline alloys with small grain sizes of
tens of nanometers exhibit low coercive fields comparable to that of amorphous
alloys. Since nanocrystalline soft magnetic materials attain remarkable soft
magnetic properties by controlling the grain size, the crystal grains'
microstructure has a substantial influence on the soft magnetic properties. In
this research, we examined the magnetic properties of Fe-Si-B-P-Cu
nanocrystalline soft magnetic alloys obtained by annealing amorphous alloys.
During crystallization, the observation findings reveal the correlation between
the generated microstructures and soft magnetic properties.
