Abstract
In this paper, we present crystal structure, electronic structure and magnetic properties of pollicrystalline Gd(Ni 1− x Fe x ) 3 intermetallic compounds. The rhombohedral PuNi 3 type of crystal structure for the whole series was confirmed with the use of X-ray powder diffraction. The partial replacement of Ni by Fe atoms up to x ≤ 0.4 causes the increase in Curie temperature T C and next for 0.4 < x ≤ 1 a slow decrease in T C value. As it was also shown saturation magnetization of the examined samples monotonically decreases with increasing Ni/Fe substitution. The magnetocaloric effect (MCE) for several samples with T C values around the room temperature was estimated from magnetic isotherms. The decrease in magnetic entropy connected with the increase in magnetic disorder in 3d magnetic sublattice has been observed. Moreover some correlations between magnetic properties and electronic structure studied by X-ray photoemission spectroscopy (XPS) have been found.
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