抄録
Experiments were carried out to create anisotropic Sm-Fe system nitriding compounds with TbCu7-type structure. Sm10Fe90 and Sm10(Fe0.95Co0.05)89.4W0.3Cu0.3 compounds were prepared by the splat-cooling and unidirectionally solidiˆcation in microgravity, and some of them were annealed in high purity Ar atmosphere at 675°C for 60min and nitrogenated in high purity N2 atmosphere at 420°C for 15 hours. Magnetic and the physical properties of these sampleswere investigated. From these results, samples prepared by the splat-cooling and the unidirectionally solidfication methods in microgravity were obtained the anisotropic ones, and nitriding samples were the anisotropic nitriding compounds. From torpue curve of Sm10(Fe0.95Co0.05)89.4W0.3Cu0.3 oriented particles measured at 27 kOe, torque (L) was (3.8 sin2 u＋0.4 sin4 u＋0.1 sin6 u)×10－6 [erg/cm3]. It was found that sample was almost uniaxial magnetic anisotropy and uniaxial magnetic anisotropy constant (KA) was KA＝6.0×106 [erg/cm3].
