Abstract
Without using costly Ag, Bi 2Sr 2CaCu 2O x (Bi-2212) conductor has been fabricated successfully on low-cost Ni tape substrate by means of a simple heat treatment. Commercial Ni tapes were heat-treated in air and thus NiO layer was formed as the buffer layer for deposition of Bi-2212. Then, Bi-2212 precursor was coated and heat-treated with a conventional slow cooling step. The obtained superconducting tape exhibited high critical current and critical current density: 184 A and 1.5×10 5 A/cm 2 at 4.2 K and 10 T, respectively.
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