Single source MOCVD system for deposition of superconducting films onto moved tapes

A new single source MOCVD-system was developed, which can be used to coat c ontinuously textured Nickel tapes. To test the YBCO deposition single cryst als and MAD buffered substrates were continuously transported with 4 m/h th rough the deposition zone. The critical current density of the superconduct ing layers at 77 K is higher than 4 MA/cm(2) on single crystalline LaAlO3 a nd higher than 2 MA/cm(2) on IBAD buffered tapes. Two routes for the buffer layer deposition on Ni are chosen: a) NiO is epitaxially grown onto textur ed Ni by thermal oxidation, b) In reducing atmosphere textured buffer layer s were deposited onto nickel.