Patent ID: 6383989
Filing Date: 2002-05-07
Classification: H01L

Abstract:
A superconducting structure comprising:a metallic substrate; and, a film of a superconducting rare-earth-barium-copper oxide upon said substrate, said film comprising a composite multilayer structure of a first layer of a superconducting rare-earth-barium-copper oxide from about 0.2 microns to about 2 microns in thickness, a layer of an insulating material selected from the group consisting of cerium oxide, strontium titanate, yttrium oxide, magnesium oxide, and yttria-stabilized zirconia, or of a conducting material selected from the group consisting of lanthanum strontium cobalt oxide and strontium ruthenium oxide, and a second layer of a superconducting rare-earth-barium-copper oxide from about 0.2 microns to about 2 microns in thickness, said superconducting structure characterized as having a total combined thickness of superconducting rare-earth-barium-copper oxide layers of at least 2 microns and characterized as having a critical current for said composite multilayer structure greater than a critical current for a single superconducting rare-earth-barium-copper oxide layer of at least 2 microns in thickness, said single superconducting rare-earth-barium-copper oxide layer including the same rare-earth as the composite multilayer structure.