Effect of magnetic field in excess conductivity of Y3Ba5Cu8O18 +/-delta ceramic doped with tin-oxide nanoparticles

In this study, the high temperature polycrystalline superconductor Y3Ba5Cu8O18 +/-delta (shortened-Y358) doped with 0.50 wt.% SnO2 (Tin-oxide) nanoparticles was produced through solid state reaction process. The excess conductivity of the sample as a function of magnetic field was systematically investigated by data of the resistivity. Two different procedures were used to determine the mean field temperature. The excess conductivity scaling, initiated through fluctuations, was obtained by two (2D) and three (3D) dimensional prototypes. In the region of close to the critical temperature, the Aslamazov and Larkin (AL) model was applied to achieve the mean field associated with the coherence length aimed at the sample. In various magnetic fields, while the temperature increased, a changeover from the 2D to the 3D area was detected at a crossover temperature (T3D-2D). TheMaki-Thompson and Lawrence-Doniach (MT-LD) theorywas examined to acquire the crossover temperatures. The results confirm that this temperature (T3D-2D) increases while the magnetic field rises. The crossover temperature was used for finding the phase-relaxation time correlated to the fluctuation pairs. The fluctuation pair lifetime, t(phi), accompany with the coherence length, xi, were calculated by means of the transition temperature and the reduced temperature changeover data when the magnetic fields were applied to the sample. Increasing the magnetic field causes the reduction of phase-relaxation time. In all cases, because of the Cooper pairs, the excess conductivity dominates 2D dimensionality performance.