A composite substrate structure including a substrate, a layer of a crystalline
metal oxide or crystalline metal oxynitride material upon the substrate, a layer
of an oriented cubic oxide material having a rock-salt-like structure upon the
crystalline metal oxide or crystalline metal oxynitride material layer is provided
together with additional layers such as one or more layers of a buffer material
upon the oriented cubic oxide material layer.
Jcs of 2.3106 A/cm2
have been demonstrated with projected Ics of 320 Amperes
across a sample 1 cm wide for a superconducting article including a flexible polycrystalline
metallic substrate, an inert oxide material layer upon the surface of the flexible
polycrystalline metallic substrate, a layer of a crystalline metal oxide or crystalline
metal oxynitride material upon the layer of the inert oxide material, a layer of
an oriented cubic oxide material having a rock-salt-like structure upon the crystalline
metal oxide or crystalline metal oxynitride material layer, a layer of a buffer
material upon the oriented cubic oxide material layer, and, a top-layer of a high
temperature superconducting material upon the layer of a buffer material.
