Microstructure and magnetic properties of amorphous and nanocrystalline Fe_(83-x)Co_xNb_3B_(13)Cu_1(x=0 or 41.5) alloys

摘要

The microstructure, saturation magnetization, magnetic susceptibility and coercivity of the amorphous and nanocrystalline Fe_(83-x)Co_xNb_3B_(13)Cu_1(x=0 or 41.5) alloys were investigated. It was stated that the replacement of 41.5 percent of Fe atoms by Co atoms in the Fe_(83)Nb_3B_(13)Cu_1 alloy enhances the saturation magnetization. Moreover, the presence of alpha-FeCo phase and amorphous matrix with the high Curie temperatures in the nanocrystalline Fe_(41.5)Co_(41.5)Nb_3B_(13)Cu_1 alloy improves high temperature magnetic properties. From Mossbauer spectroscopy investigations we have found that alpha-FeCo phase in that alloy is atomically ordered.