Buffer layers on metal alloy substrates for superconducting tapes

Abstract

An article including a substrate, a layer of an inert oxide material upon the surface of the substrate, a layer of an amorphous oxide or oxynitride material upon the inert oxide material layer, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the amorphous oxide material layer, and a layer of a SrRuO 3 buffer material upon the oriented cubic oxide material layer is provided together with additional layers such as a HTS top-layer of YBCO directly upon the layer of a SrRuO 3 buffer material layer. With a HTS top-layer of YBCO upon at least one layer of the SrRuO 3 buffer material in such an article, J c 's of up to 1.3×10 6 A/cm 2 have been demonstrated with projected I c 's of over 200 Amperes across a sample 1 cm wide.

1 - 24 . (canceled)  
     
     
         25 . An article comprising: 
 a substrate;    an inert oxide material upon the surface of the substrate;    a layer of an amorphous oxide or oxynitride material upon the inert oxide material layer;    a layer of oriented yttria-stabilized zirconia upon the amorphous oxide or oxynitride material layer; and,    a layer of strontium ruthenate upon the layer of yttria-stabilized zirconia.    
     
     
         26 . The article of  claim 25  further including a top-layer of a superconducting material upon the oriented cubic oxide material layer.  
     
     
         27 . The article of  claim 26  wherein said superconducting material is YBCO.  
     
     
         28 . The article of  claim 25  wherein the substrate is a flexible polycrystalline metal.  
     
     
         29 . A thin film template structure for subsequent epitaxial thin film deposition comprising: 
 a polycrystalline flexible metal substrate;    a layer of an inert oxide material upon the surface of the polycrystalline flexible metal substrate;    a layer of an amorphous oxide or oxynitride material upon the inert oxide material layer;    a layer of oriented yttria-stabilized zirconia upon the amorphous oxide or oxynitride material layer; and,    a layer of strontium ruthenate upon the layer of yttria-stabilized zirconia.