Properties of YBa2Cu3O7−δ Superconducting Films on Sr2YSbO6 Buffer Layers

Abstract

In a previously publishedworkwe have shown that the Sr2YSbO6 material can be successfully used as a buffer layer for the epitaxial growth of YBa2Cu3O7−δ films with high density current value in self-field at 77 K (Ortiz-Diaz et al., 2010). The layer of Sr2YSbO6 material plays the role of a buffer layer because the negative effects of MgO over the superconducting properties of YBa2Cu3O7−δ films were eliminated, and because it evidences an excellent structural matching with YBa2Cu3O7−δ and with MgO. These results show that Sr2YSbO6 can be an excellent substrate material for the YBa2Cu3O7−δ layers in coated conductors, using the IBAD–MgO templates. Besides which, with the Sr2YSbO6 material the architecture of the coated conductors can be simplified, because only a single Sr2YSbO6 buffer layer is used.