A Study on Synthesis and Characterization Analysis of Metal Ions Doped High Temperature Oxide Y-123

In this paper, we have presented our studies regarding the variation in superconducting properties when Cu metal in YBCO has been doped by metal ion M (=Zr) .The sample is prepared by solid state-reaction method. Characterisation of the sample is done by measuring d.c. electrical resistivity and X-Ray diffraction studies of the sample. The excess conductivity above T_c in HTSC is more important than for low temperature superconductors. In order to find the excess resistivity or excess conductivity of the sample, Aslamazov and Larkin derived the relation Δσ=Aε^λ, Where Δσ is the excess conductivity, A is a temperature independent constant, ε is the reduced temperature and λ is the critical exponent. The resistance of the sample is determined by d.c. four probe method.