TYTBa2CU3O7-delta thick films grown on textured metal substrates by liquid-phase epitaxy process

Towards high-current wire application of high-temperature superconductors, YBa2Cu3O7-delta (YBCO) thick films are grown by means of a Liquid-phase epi taxy (LPE) process on a (001) surface of NiO single crystal and Laser-sputt ered NiO buffer layer deposited on a (001) surface of SrTiO3 single crystal . NiO buffer layers can be rapidly formed on textured Ni tape by the recent ly developed "Surface-Oxidation-Epitaxy" (SOE) technique which is expected to be a low-cost production method of long metal substrates with highly-tex tured oxide buffer layer. LPE growth on SOE-buffered textured Ni tapes are also attempted. Moreover, we successfully prepared similar to0.1 m-long LPE -YBCO tapes on {120}< 2(1) over bar 0 > Ag-0.1 wt.% Cu alloy tape by using a specially designed LPE furnace equipped with a "reel-to-reel" attachment. BaF2-added BaO-CuO flux is used in this work, in which the growth temperat ure of YBCO is drastically lowered from usually used value of similar to 10 00 degreesC down to 900-930 degreesC, While current transport performances of these LPE-YBCO films are still insufficient for high-current wire applic ation, the present results show the high potential of this LPE process for long-length coated-conductor production.