STRUCTURAL AND DOPING STUDIES OF NEW QUADRUPLE PEROVSKITE LN(2)BA(2)CU(2)TI(2-X)SN(X)O(11-DELTA) 0.0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.5 LN=GD, SM

The new quadruple perovskite Ln(b2)Cu(2)Ti(2-x)Sn(x)O(11-6), 0.0 less than or equal to x less than or equal to 0.5, Ln = Gd, Sm have structures based on alternating double layers of CuO5 square pyramids and TiO6 octahedra. The structural properties of the doped derivatives of these materials have been studied by X-ray diffraction and thermogravimetric analysis in order to determine the oxygen content of these materials. Substitution of Sc on the Ti site has been successfully undertaken with the object of raising the copper oxidation state above 2+. The electronic properties of these materials have been measured and are reported.