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Buffer layers on metal alloy substrates for superconducting tapes

United States Patent

June 29, 2004
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
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.sub.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.sub.3 buffer material layer. With a HTS top-layer of YBCO upon at least one layer of the SrRuO.sub.3 buffer material in such an article, J.sub.c 's of up to 1.3.times.10.sup.6 A/cm.sup.2 have been demonstrated with projected IC's of over 200 Amperes across a sample 1 cm wide.
Jia; Quanxi (Los Alamos, NM), Foltyn; Stephen R. (Los Alamos, NM), Arendt; Paul N. (Los Alamos, NM), Groves; James R. (Los Alamos, NM)
The Regents of the University of California (Los Alamos, NM)
10/ 113,476
March 28, 2002
STATEMENT REGARDING FEDERAL RIGHTS This invention was made with government support under Contract No. W-7405ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.