Article

Sr2YSbO6 as a buffer layer for YBa2Cu3O7−δ superconducting films

Grupo de Física de Materiales (GFM), Escuela de Física, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia; A. A. 14490 Bogotá DC, Colombia
Journal of Materials Science (Impact Factor: 2.16). 01/2011; 46(3):688-692. DOI: 10.1007/s10853-010-4794-8

ABSTRACT We report the epitaxial growth of Sr2YSbO6 films over a MgO single crystal using magnetron sputtering technique. Sr2YSbO6 films were used as a buffer layer for growth of YBa2Cu3O7−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/cm2. These results, as well as good lattice matching and chemical stability between Sr2YSbO6 and YBa2Cu3O7−δ, suggest that Sr2YSbO6 is an ideal material to be applied as buffer layer for high-performance superconductor coatings. For instance, Sr2YSbO6 material can be used as a single buffer layer in coated conductor tapes based on ion beam assisted deposition of MgO template
(IBAD-MgO).

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