SUPERCONDUCTIVITY AND ANTIFERROMAGNETIC ORDERING IN (GD, ND, CE)2CUO4

Magnetic and superconducting properties of Gd1.85-xNdxCe0.15CuO4 and Gd2-xCexCuO4 have been studied. The antiferromagnetic ordering temperature of Cu decreases with increasing Ce content in Gd2-xCexCuO4 and further decreases when Nd is substituted for Gd. In Gd1.85-xNdxCe0.15CuO4, the antiferromagnetic ordering of Cu disappears at about x = 0.5 and superconductivity appears at about x = 0.8. The temperature - Nd concentration phase diagram for Gd1.85-xNdxCe0.15CUO4 is reported. Resistivity measurements reveal that the substitution of Nd for Gd results in an increase of charge carrier number. The antiferromagnetic ordering of Gd coexists with superconductivity at low temperatures. A possible explanation for the effect of Nd substitution is discussed.Physics, AppliedSCI(E)EI28ARTICLE1-266-7019