Magnetism and electronic structure of selected Gd1−xSmxIn3 compounds

► Polycrystalline Gd1−xSmxIn3 series crystallize in the cubic AuCu3 crystal structure. ► The lattice parameter a increases with Gd/Sm substitution. ► The value of the Néel temperature (TN) decreases from 47 K (x = 0.0) to 17 K (x = 1.0). ► Below TN an additional magnetic phase transition is observed. ► Gd/Sm substitution causes the appearing of intermediate valence of samarium ions.