Sr2YSbO6 as a buffer layer for YBa2Cu3O7−δ superconducting films

• Published in: Journal of materials science 2011-02, Vol.46 (3), p.688-692
• Main Authors: Ortiz-Diaz, O., Saldarriaga, W., Lopera, W., Reyes, D., Cortes, A., Caicedo, J. M., Tellez, D. A. Landinez, Roa-Rojas, J.
• Format: Article
• Language: English
• Subjects: Buffer layers; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Conductors; Critical current density; Critical temperature; Crystallography and Scattering Methods; Epitaxial growth; Ion beam assisted deposition; Lattice matching; Magnesium oxide; Magnetron sputtering; Materials Science; Organic chemistry; Photovoltaic cells; Polymer Sciences; Single crystals; Solid Mechanics; Superconducting films; Superconducting tapes; Superconductivity; YBCO superconductors
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-010-4794-8

We report the epitaxial growth of Sr 2 YSbO 6 films over a MgO single crystal using magnetron sputtering technique. Sr 2 YSbO 6 films were used as a buffer layer for growth of YBa 2 Cu 3 O 7−δ films by DC sputtering. It was experimentally determined that the films evidence superconducting properties, such as a critical temperature of 90 K and a self-field critical current density at 77 K of 0.8 MA/cm 2 . These results, as well as good lattice matching and chemical stability between Sr 2 YSbO 6 and YBa 2 Cu 3 O 7−δ , suggest that Sr 2 YSbO 6 is an ideal material to be applied as buffer layer for high-performance superconductor coatings. For instance, Sr 2 YSbO 6 material can be used as a single buffer layer in coated conductor tapes based on ion beam assisted deposition of MgO template (IBAD-MgO).