STRUCTURAL, ELECTRICAL AND MAGNETIC STUDIES OF INFINITE-LAYERED SR1-XLAXCUO2 SUPERCONDUCTOR

Superconductivities were investigated in infinite-layered Sr1-xLaxCuO2 prepared in a reductive atmosphere under high pressure. Its solid solution limit was estimated to be just above x = 0.10. The T(c onset) values were in a range of 42-43 K independently of x and all samples attained the zero resistivities. The volume fraction of the superconductor showed a maximum at x = 0.10. Their oxygen contents were analyzed to be not more than 2. The value of thermoelectric power was negative but its Hall coefficient had a positive value in a temperature range from room temperature to 77 K for the x = 0.10 sample. These results indicate that electrons were coped into the conduction plane in the infinite-layered compound.