Effects of Mn doping on the superconductivity in La2−xSrxCuO4

In this paper the effects of Mn doping on the superconductivity in La2−xSrxCuO4 superconductor is studied. It is found that the superconducting transition temperature Tc keeps at 37K in La1.85−1.5xSr0.15+1.5xCu1−xMnxO4 for x⩽0.1. This result indicates that the suppression of superconductivity in Mn doped system does not fit the Abrikosov and Gork’ov theory which predicts that Tc should decrease in the presence of magnetic impurities. We suggest that the Mn impurities only localize the charge carriers around them.