Abstract
Recent activities in the R&D of coated conductors are reviewed. Coated conductors were classified into two groups based on the architecture. One group is textured metal substrates such as RABiTS. In this group, a high performance of Ic=186 A/cmw in a 34 m-long tape was realized using a TFA-MOD process with several PVD buffer layers. Remarkable results have also been reported by the other R&D group, which uses IBAD buffered substrates. Combined with the PLD method for the YBCO layer, the highest values of Ic·L have been obtained. The highest Ic·L value is 13230 Am by Fujikura. Aiming at lower processing costs, TFA-MOD and MOCVD processes have also been investigated using IBAD substrates. SRL achieved an extremely high Ic value of 413 A/cm-w in a tape produced using the TFA-MOD process. R&D efforts in long tape processing have led to a 8.6 m-long tape with 119 A/cm-w as the Ic value.
