We made Ni tapes with tilted [001]-axes for the deposition of YBCO. We called them RATS(Rolling Assisted Textured Substrates). RATS were totally different from RABiTS(Rolling Assisted Textured Substrates). RATS were made by rolling and annealing of high purity Ni and especially, methods of locally electrical spot welding and partial annealing of moving Ni tapes. RATS had [001]-axes tilted around rolling direction and [100]-axes paralled to the rolling direction. We compared RATS and RABiTS by XRD measurement. The Crystalline textures of RATS were better than those of RABiTS. And RATS were single crystal. The average grain size of RATS was 10㎠.
We deposited buffer layers on RATS by e-beam evaporation. The structures of buffer layers were $CeO_2$/YSZ/$CeO_2$ and YSZ/$CeO_2$. The crystalline textures of buffer layers were very good and [001]-axes of buffer layer tilted by degree of those of RATS.
Then, we deposited YBCO by methods of magnetron sputtering and thermal coevaporation. The c-axes of YBCO layers on YSZ/$CeO_2$ grew normally to the surface and on $CeO_2$/YSZ/$CeO_2$ grew tilted. The crystalline textures of YBCO layers were very good too.
We measured the critical temperature($T_c$) and the critical current density($J_c$) by 4 probe method. $T_c$ was 84K and $J_c$ was $1.4 \times 10^5A/cm^2$ at 77K. $J_c$ had anisotropic properties to the rolling direction and the perpendicular to the rolling direction.
