SUPERCONDUCTING PROPERTY IN Mn DOPED La_1.85Sr_0.15CuO₄ SYSTEM

In this paper the superconducting properties in La_1.85SSr_0.15Cu_1-xMn_xO₄ and La_1.85-2xSr_0.15+2xCu_1-xMn_xO₄ samples are discussed. The superconducting transition temperature keeps constantly at 37 K for all superconducting samples. The suppression of superconductivity in these systems does not fit the Arbrikosov and Gork'ov theory which predicts that T_c should decrease in the presence of magnetic impurities in the lattice. The magnetic pair-breaking effect is not the reason for the suppression of superconductivity in Mn doping systems. The localization of carriers in the CuO₂ plane induced by Mn doping should be responsible for the suppression of superconductivity.