Superconducting properties of Ca-doped MoSr2YCu2O8−δ

We synthesized samples with nominal compositions MoSr2YCu2O8−δ and MoSr2Y0.8Ca0.2Cu2Oy and investigated their superconducting properties. It was established that the Ca-doping increases the Tc of samples, prepared at different conditions. It was found that this doping does not destroy the antiferromagnetic state of the undoped Mo-1212 but significantly decreases the remnant magnetization. The effect of the inhomogeneous Ca-distribution on the superconducting properties of the doped samples was discussed.