Co-substitution effect in superconducting (La, Sr)2(Ca, Y)Cu2O6

Abstract The effect of cation substitution in the La 1.8 Sr 0.2 CaCu 2 O 6 superconductor was investigated. La and Ca atoms were simultaneously substituted by Sr and Y, respectively. The ceramic samples with nominal compositions of La 1.8− x Sr 0.2+ x Ca 1− x Y x Cu 2 O 6 ( x =0.0 to 0.5) were prepared by using an O 2 —HIP (hot isostatic pressing) technique. Single-phase samples were obtained over the whole range of x . The superconductivity transition was lowered with increasing x .