Effect of Y substitution on the structural and magnetic properties of Sm(Fe0.8Co0.2)11.4Ti0.6

The structural and magnetic properties of (Sm, Y)(Fe0.8Co0.2)12−xTix (x = 0.6, 1) prepared by arc melting are investigated. The formation of the ThMn12 structure was facilitated by the substitution of Sm with Y at low Ti concentrations (x = 0.6), and almost a single phase with the ThMn12 structure was obtained for (Sm0.8Y0.2)(Fe0.8Co0.2)11.4Ti0.6. This suggests that Y plays an important role in stabilizing the ThMn12 structure owing to the decrease in the atomic radius of the rare earth site. The intrinsic magnetic properties of (Sm0.8Y0.2)(Fe0.8Co0.2)11.4Ti0.6 exhibited μ0Ms = 1.50 T, μ0Ha = 11 T, and Tc = 820 K at room temperature.