Abstract
Polycrystalline samples of pseudo-ternary intermetallic Nd 3- x Gd x Co 11B 4 ( x=0, 1, 2, 3) borides prepared by standard arc-melting were characterized by X-ray powder diffraction (XRPD), magnetization and differential scanning calorimetry (DSC) measurements. The X-ray diffraction patterns indicated the hexagonal Ce 3Co 11B 4-type structure with P6/ mmm space group for each composition. The substitution of Gd for Nd led to a decrease of the unit-cell parameters a and the unit-cell volume V, while the unit-cell parameter c increased linearly. Magnetic measurements indicated that all samples were ordered magnetically below the Curie temperature. The Curie temperatures increased as Nd was substituted by Gd. The saturation magnetization at 4 K decreased upon the Gd substitution up to x=1, and then increased.
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