Abstract
Superconducting Bi–Pb–Sr–Ca–Cu–O thin films of zero resistivity temperature 108 K and critical current density of 1000 A/cm2 (at 77 K) were deposited on MgO(100) single-crystal substrates by DC magnetron sputtering. After depositing at 350–400°C and post annealing at 837.5°C for 1–5 hours in air, with different cooling rate we got highly c-axis oriented thin films which show zero resistivity at 103 K, 108 K. The results we got show an interesting phenomenon: the mixture of high and low Tc phase exhibit a low onset, sharp transition and high current density.
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