Superconductivity and Structure of (Tl, Pb)((Eu, La), Sr)2CuOx

Abstract
The superconductivity and structure of (Tl, Pb)((Eu, La), Sr)2CuO x with different Eu/La molar ratios have been investigated by means of resistivity measurements and X-ray diffractometry. Superconductivity is observed for this solidsolution system. The lattice parameters change with the Eu/La molar ratio and the stability of the superconducting phase is related to the lattice parameters.