Abstract
Temperature variation of magneto-resistivity measurements have been carried out at 1 T magnetic field on (La1.5Gd0.5)Ba2CaCu5Oz and, on pure and 5 wt.% Ag doped (La1.6Y0.4)Ba2Ca0.8Cu4.8Oz superconductors. These data were analyzed in terms of fluctuation magneto-conductivity by using Aslamazov—Larkin and Maki—Thompson models for layered superconductors. These materials exhibit strong pair breaking effect and the typical phase breaking time at 100 K is found to be in the order of 10−16 s. The typical values of coherence lengths along ab plane and along c-direction at 0 K are found to be 16.6 and 0.5 A.
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