（Fe，Mn，Co）-Y系非晶質合金の磁性

抄録

Magnetic moment m, Curie temperature T_c, density ρ and Young's modulus E_S of amorphous Mn-Y, Fe-Y, Co-Y, (Fe-Mn)₈₀Y₂₀ and (Fe-Co)₈₀Y₂₀ alloys fabricated by rapid quenching have been measured to make clear microstructures of amorphous alloys. Detailed comparison of m, T_c, ρ and E_S between amorphous alloys and corresponding crystalline compounds, and a structural analysis by X-ray diffraction reveal a close correlation of an atomic short range order of both states, which is especially found in alloys with Y content less than 30at%. A structural variation between 30 and 40 at%Y in the Fe-Y amorphous alloys is also indicated by the composition dependence of m, T_c, ρ, E_S and by X-ray analysis.