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A systematic study of syntheses and magnetic properties of the Nd_3Fe_(29-x)Cr_x (x=4.5, 4.7, 5.0, and 5.5) compounds has been performed. The single-phase compounds of Nd_3Fe_(29-x)Cr_x can be formed in the range 4.5≤ x ≤ 5.5. The Curie temperature T_C, the saturation magnetization M_s at 4.2 K, the anisotropy field H_A at 4.2 K and room temperature. and the intra-sublattice exchange coupling parameter j_(FeFe) at 4.2 K for the Nd_3Fe_(29-x)Cr_x compounds decrease with increasing Cr composition from x=4.5 to 5.5, respectively. Nitrogenation and carbonation, unlike hydrogenation. result mainly in improvements of the Curie temperature, the saturation magnetization and the anisotropy field at 4.2 K and room temperature for the Nd_3Fe_(29-x)Cr_x compounds compared with their parent compounds.
A systematic study of syntheses and magnetic properties of Nd 3 Fe 29-x Cr x (x = 4.5, 4.7, 5.0, and 5.5) has been performed. The single-phase compounds of Nd 3 Fe 29- x Cr x can be formed in the range 4.5 ≦ x ≦ 5.5. The Curie temperature T_C, the saturation magnetization M_s at 4.2 K, the anisotropy field H_A at 4.2 K and room temperature. and the intra-sublattice exchange coupling parameter j_ (FeFe) at 4.2 K for the Nd_3Fe_ (29-x) Cr_x compounds decrease with increasing Cr composition from x = 4.5 to 5.5, respectively. Nitrogenation and carbonation, unlike hydrogenation. Result mainly in improvements of the Curie temperature, the saturation magnetization and the anisotropy field at 4.2 K and room temperature for the Nd_3Fe_ (29-x) Cr_x compounds compared with their parent compounds.