Abstract
The phase formation and magnetic properties of RE 2(Fe 1− x Mo x ) 17 alloys (RE=Nd, Gd; 0.00≤ x≤0.10) have been investigated by X-ray diffraction and magnetic measurements. The samples were prepared by arc melting and annealing at 1100°C. The Rietveld method was employed to perform a quantitative determination of phase composition and lattice parameters. Our results suggest that the substitution of Mo in 2:17 is low. In the 0.00≤ x≤0.05 composition range, samples are almost single phase with the rhombohedral Th 2Zn 17-type crystal structure; with the substitution of Fe for Mo a slight lattice expansion is induced. For higher Mo concentrations, this phase co-exists with a certain amount of spurious phases. The saturation magnetization and Curie temperatures do not show remarkable variations when Mo replaces Fe in Nd 2(Fe 1− x Mo x ) 17 samples. In Gd 2(Fe 1− x Mo x ) 17 the increase in the Mo content leads to a decrease in both physical quantities.
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