Combinative energy and properties of Y1−xSrxBa2−xLaxCu3Oy system

The compensated systems of Y 1− null null x null Sr null x null Ba 2− null null x null La null x null Cu 3 O null y null null were synthesized and characterized by DC magnetization measurements and X-ray diffraction. The structures of the samples were refined by Rietveld method. Although the carrier concentration in the samples is constant at different doping levels, the superconductivity evidently changes. The combinative energy in the system...