Microstructures of Fe_77-xNi_xCu₁Nb₂P₁₄B₆ Soft Magnetic Alloys Studied by X-Ray Absorption Fine Structure

Local structures of the mechanically alloyed Fe_77-xNi_xCu₁Nb₂P₁₄B₆soft magnetic materials have been investigated by x-ray absorption fine structure. The results show that mechanical alloying (MA) can drive the Fe_77-xNi_xCu₁Nb₂P₁₄B₆powder mixture to produce amorphous alloy when the atomic concentration of Fe element is about and over 40%. On the contrary, the MA Fe_77-xNi_xCu₁Nb₂P₁₄B₆is a solid solution with an fcc-like structure in the region o f lower Fe at Fe_77-xNi_xCu₁Nb₂P₁₄B₆ omic concentration (< 22%), preserving a medium-range order around Ni and Fe atoms. Moreover, we have found that the local structure geometry of Fe atom is similar to that of Ni atom for all the MA Fe_77-xNi_xCu₁Nb₂P₁₄B₆ samples. It indicates that the local structures of Fe and Ni atoms in a Fe_77-xNi_xCu₁Nb₂P₁₄B₆ sample only depend on the x value of element Ni after ball milling.