Superconductivity and ferromagnetism in Mn-doped La0.84PrSr0.16CuO4 and Mn-doped LaPr0.88Ce0.12CuO4

A series of La0.84-1.5xPrSr0.16+1.5xCu1-xMnxO4 (x=0, 0.05, 0.10, 0.15, 0.20, 0.25, and 0.5) and LaPr0.88+1.5yCe0.12-1.5yCu1-yMnyO4 (y=0, 0.04, 0.08, 0.10, 0.15, 0.20, and 0.3) were synthesized by solid-state reaction and studied by X-ray diffraction, electric transport property, and magnetic measurements. The structural distortion, superconductivity, and magnetism of the samples caused by Mn doping were examined and analyzed. An unusual behavior of superconductivity suppression by Mn doping as well as the coexistence of ferromagnetism and superconductivity is observed.