Journal of Materials Science, Vol.33, No.1, 207-210, 1998
Superconductivity in (Bi,Pb)(2)Ca2Sr2Cu3-xVxOy
The superconducting properties of V-doped (Bi,Pb)(2)Sr2Ca2Cu3Oy (2223) samples have been investigated by means of X-ray diffraction and electrical resistivity measurements. The volume fraction of the 2223 phase decreases with a decrease in the c lattice parameter. The onset of superconductivity in the samples remains almost constant while the temperature at which the resistivity becomes zero decreases with increasing dopant content. The electrical resistivity data suggest that the substitution of copper by vanadium suppresses the superconductivity in (Bi,Pb)(2)Sr2Ca2Cu3-xVxOy by destroying the phase coherence and by pair-breaking effects. The suppression of superconductivity in the system could also be due to a decrease in the carrier concentration.