Fabrication of an oxide superconducting wire by a drawing-rolling method

A tape-shaped wire with YBa sub 2 Cu sub 3 O sub 7 core and Ag sheath was fabricated by a drawing--rolling method. The critical current density J sub c apparently depended on the thickness of the tape and increased markedly with decreasing tape thickness. The maximum J sub c of 3330 A/cm exp 2 at 77K in a zero magnetic field was achieved in a tape with 0.06 mm thickness. The presence of a 20 mT magnetic field reduced the J sub c value by 1/100. 8 ref.--AA