SUPERCONDUCTING PROPERTIES OF YB1-XPRXBA2CU3O7-DELTA

A series of Pr-doped Yb1-xPrxBa2Cu3O7-delta, (0<x<1) oxides has been s ynthesized. The structure remained orthorhombic throughout the solid s olution range 0less-than-or-equal-to x less-than-or-equal-to 1 and the lattice parameters increased with Pr ion concentration, x. The superc onducting transition temperature, T(c), was significantly higher for e ach x than for the corresponding Y1-xPrxBa2Cu3O7-delta oxides. The hig her T(c) in this series is suggested to be due to the smaller ionic ra dius of the Yb3+ ion.