Abstract
A low cost electrodeposition method is tested for the fabricating high-temperature superconducting wire or tape. Recent studies on the development of biaxially textured electrodeposited (ED) films on Ag-coated, single-crystal substrates are reported. Pole-figure measurements of electrodeposited (Tl)–Ba–Ca–Cu–O and (Tl, Bi)–(Sr, Ba)–Ca–Cu–Ag–O films on 300 Å Ag/LaAlO 3, with thickness between 1 and 5 μm, clearly show strong biaxial texturing. The omega scan and phi scan of (TlBi) 0.9Sr 1.6Ba 0.4Ca 2Cu 3Ag 0.2O x indicate the full width half maximum (FWHM) of only 0.9° and 1.2°, respectively, which indicate a very high-quality film prepared by electrodeposition process. Transport measurements for the ED films show values of 3×10 5 A/cm 2 at 77 K in zero field. Single-layer thallium-oxide films, with Pb, Bi, and Sr substitution, offer the potential for operation at 77 K in practical magnetic fields of 3–5 T.
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