Effects of zirconium and titanium addition on magnetic properties of Sm(Fe,Co)10 melt-spun ribbons

In this study, zirconium (Zr) and titanium (Ti) were added to samarium-iron-cobalt (Sm(Fe _0.7Co _0.3) ₁₀) melt-spun ribbons in order to increase the coercivity of Sm(Fe _0.7Co _0.3) ₁₀ alloys without nitrogenation. The substitution of Zr for Sm in the Sm(Fe _0.7 Co _0.3) ₁₀ alloys increased the saturation magnetization but decreased the coercivity. The substitution of Ti for (Fe _0.7Co _0.3) in the Sm(Fe _0.7Co _0.3) ₁₀ alloys decreased both the saturation magnetization and the coercivity. On the other hand, Ti substitution for (Fe _0.7Co _0.3) in the (Sm,Zr) (Fe _0.7Co _0.3) ₁₀ alloys resulted in an increase in coercivity. A high coercivity of 4.35 kOe was achieved in the (Sm _0.6Zr _0.4)(Fe _0.7Co _0.3) _9.5Ti _0.5 alloys. It was thus demonstrated that the coercivity of Sm(Fe _0.7Co _0.3) ₁₀ alloys can be improved by substitution with both the Ti and Zr.