Superconducting and structural properties of YBCO/CeO2/NiCr14 tapes prepared by thermal co-evaporation

Authors report on the in situ growth and characterization of c-axis oriented superconducting YBa2Cu3O7-d/CeO2 structures deposited on biaxially textured Ni-Cr alloy tapes by thermal and e-beam evaporation. Authors have studied the effect of growth temperature on the degree of texturing of both CeO2 and YBCO layers. Authors find that the highest degree of texture of both layers and best superconducting properties with sharp transitions and zero resistance Tc in excess of 85 K are obtained for substrate temperatures during deposition above 700 C. 5 refs.