Conductive buffer layers and overlayers for the thermal stability of coated conductors

We analyze fundamental issues related to the thermal and electrical stability of a coated conductor during its operation. We address the role of conductive buffer layers in the stability of Ni-based coated conductors, and the effect of a metallic cap layer on the electrical properties of Ni alloy-ba...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2001-03, Vol.11 (1), p.3309-3312
Main Authors: Cantoni, C., Aytug, T., Verebelyi, D.T., Paranthaman, M., Specht, E.D., Norton, D.P., Christen, D.K.
Format: Article
Language:English
Subjects:
Applied sciences
Buffer layers
COATINGS
Conductors
COPPER OXIDE
Current measurement
ELECTRICAL CONDUCTIVITY
ELECTRICAL CONDUCTORS
Electrical engineering. Electrical power engineering
Exact sciences and technology
Fabrication
Materials
Multilayers
Nickel
Nickel alloys
OXIDES
Prototypes
Silver
Stability
Stability analysis
Superconducting films
Superconducting tapes
TAPE
Thermal conductivity
THERMAL STABILITY
YTTRIUM OXIDE
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Summary:We analyze fundamental issues related to the thermal and electrical stability of a coated conductor during its operation. We address the role of conductive buffer layers in the stability of Ni-based coated conductors, and the effect of a metallic cap layer on the electrical properties of Ni alloy-based superconducting tapes. For the first case we report on the fabrication of a fully conductive RABiTS architecture formed of bilayers of conductive oxides SrRuO/sub 3/ and LaNiO/sub 3/ on textured Ni tapes. For the second case we discuss measurements of current-voltage relations on Ag/YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// and Cu/Ag/YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// prototype multilayers on insulating substrates. Limitations on the overall tape structure and properties that are posed by the stability requirement are presented.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.919770