PROPERTIES OF Y_1-XSR_XBA_2-XLA_XCU₃O_Y CARRIER COMPENSATION SYSTEM

Abstract

The samples of Y 1-x Sr x Ba 2-x La x Cu 3 O y (YSBLCO) 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 dopant levels, the superconductivity evidently changes. We attribute decrease in Tc to a charge redistribution in the crystalline lattice. Comparing the change of the T c value caused by structural influence and carrier concentration, it is suggested that the influence of structural changes on the superconductivity is independent of that induced by carrier concentration.