Magnetic properties and crystal structure of novel high anisotropic compounds based on the RFeV system (RY, Nd, Sm, Gd)

We have investigated the crystal structure and magnetic properties of novel ternary compounds of the composition R 2(Fe 0.91V 0.09) 17 (R≡Y, Nd, Sm, Gd). X-ray diffraction showed that their crystal structure is a superstructure of a new type based on the CaCu 6 structure, but with lattice parameters five times larger than those of CaCu 5. The Curie temperature and saturation magnetization of the compounds studied fall into the ranges 440–520 K and 15–30 μ B (f.u.) −1 at 4.2 K respectively. The influence of dissolved cobalt, carbon and nitrogen on the magnetic properties of the compounds R 2(Fe 0.91V 0.09) 17 has been studied.