Influence of Transition Metal Substitution on the Low-Field Magnetic Properties in the $Gd(Ni_{1-x}T_{x})₃$ (T = Fe, Co) Intermetallic Compounds

The low-field magnetic properties of polycrystalline $Gd(Ni_{1-x}T_{x})₃$ (T = Fe, Co) intermetallic compounds are presented. The whole system crystallizes in the rhombohedral PuNi₃ type of crystal structure. The composition dependence of the Curie temperature $T_{C}(x)$ is associated with the change in the number of 3d electrons. Moreover, the field cooled and zero field cooled (FC-ZFC) curves at low applied magnetic field are related to the anisotropy of T element. The saturation magnetic moment $M_S(x)$ upon doping was estimated based on the hysteresis loops M(H).