YBa2Cu3Ox-SrTiO3 multilayer approach on textured Ni-W tapes: Morphology, structure and critical current density improvement

Publication date: 1 January 2016
Source:Thin Solid Films, Volume 598
Author(s): T.S. Krylova, I.A. Chernykh, M.Y. Chernykh, E.P. Krasnoperov, M.L. Zanaveskin
Multilayer epitaxial structure YBa2Cu3Ox–interlayer–YBa2Cu3Ox is a promising architecture for YBa2Cu3Ox (YBCO) superconductors. We formed single YBCO layers and multilayer epitaxial structures YBCO–interlayer–YBCO by pulsed laser deposition method on the cube textured Ni-W tapes. The use of SrTiO3 interlayers enabled to stop YBCO film morphology and microstructure degradation and maintain high critical current density (J c). J c in 1μm thick multilayer film composed of four 250nm thick YBCO layers is comparable to J c in single-layer 250nm thick YBCO film. Application of this method allows overcoming such fundamental problem as degradation of J c in thick films and multiplying critical current with number of YBCO layers.