Influence of vanadium doping on the behavior of YBa2Cu3O7-y

Abstract

YBa3Cu3-xVxO7-y(x=0, 0.1, 0.2, 0.3, 0.4, 0.S and 0.6) superconductors have been prepared. X-ray diffraction shows that the system remains orthorhombic for all compositions studied, but for x > 0.4 V2O5 was detected at an impurity phase. Substitution of V5+ for Cu2+ occurs in the Cu(2) sites on the Cu(2)—O planes. The introduction of the high valence element, vanadium, produces the extra free-electrons. These electrons recombine with the positive carrier of the system. It makes depression of the mobility and the Hall number of =YBa2 Cu3-xVO7-y and also results in a depression of TC.