Superconducting and Normal-state Properties of Y(Sr$_{2-x}$Ba$_x$)Cu$_{2.7}$Mo$_{0.3}$O$_z$

The effect of Ba substitution for Sr on the lattice parameters and the temperature dependence of the thermoelectric power and electrical resistivity has been investigated for Y(Sr$_{2-x}$Ba$_x$)Cu$_{2.7}$Mo$_{0.3}$O$_z$ (x=0${\sim}$2.0). Both a and c lattice parameters increase as the Ba content, x increases. The correlation between Tc and the carrier concentration estimated from the thermoelectric power data indicates that the change of hole concentration is negligible for x ${\le}$ 1.0 in contrast to the large change for x > 1.