Growth of YBCO films on MgO-based rolling-assisted biaxially textured substratestemplates

Abstract

We have developed a simple alternative buffer layer architecture for the rolling-assistedbiaxially textured substrates (RABiTS) approach. Buffer layers with both oxygen andmetal diffusion barrier properties are of interest. Cube textured magnesium oxide MgObuffers were grown directly on biaxially textured Ni and Ni–W3 at.% substrates usingelectron beam evaporation. We have also grown epitaxial MgO layers on 2 m longtextured Ni–W3 at.% tapes in a reel-to-reel e-beam evaporation. Highly texturedLaMnO3 (LMO) buffers were grown on MgO-buffered Ni substrates using rfsputtering. MgO and LMO buffers have been proved to be good oxygendiffusion barriers and Ni diffusion barriers, respectively. YBCO films with aJc of1 × 106 A cm−2 at 77 K and self-field were grown on this newly developed architecture of LMO/MgO/Niusing pulsed laser deposition.