(Sm,Y)(Fe,Co)_12-xTi_xにおける生成相と磁気特性

抄録

  The structural and magnetic properties of (Sm,Y)(Fe,Co)_12-xTi_x (x = 0.5, 0.6) prepared by arc melting and rapid quenching are investigated. The formation of the TbCu₇-type phase were facilitated with decreasing amount of Ti concentrations, and many amount of TbCu₇-type phase was observed for arc melted alloy at low Ti concentrations (x = 0.5). In the contrast, the volume fraction of TbCu₇-type phase was reduced remarkably for rapidly quenched alloy. This shows that the formation of the ThMn₁₂ structure was facilitated by rapid quenching at low Ti concentrations. When compared with the same amount of Ti concentrations (x = 0.5), the value of saturation magnetization of rapidly quenched alloy which was 1.55 T was higher than that of arc melted alloy.