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

Author

Cantoni, C. ; Aytug, T. ; Verebelyi, D.T. ; Paranthaman, M. ; Specht, E.D. ; Norton, D.P. ; Christen, D.K.

Author_Institution

Div. of Solid State, Oak Ridge Nat. Lab., TN, USA

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3309

Lastpage

3312

Abstract

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 SrRuO₃ and LaNiO₃ on textured Ni tapes. For the second case we discuss measurements of current-voltage relations on Ag/YBa₂Cu₃O_7-δ and Cu/Ag/YBa₂Cu₃O_7-δ prototype multilayers on insulating substrates. Limitations on the overall tape structure and properties that are posed by the stability requirement are presented

Keywords

barium compounds; copper; high-temperature superconductors; lanthanum compounds; nickel alloys; silver; strontium compounds; superconducting superlattices; superconducting tapes; thermal stability; yttrium compounds; Ag/YBa₂Cu₃O_7-δ; Cu-Ag-YBa₂Cu₃O₇; Cu/Ag/YBa₂Cu₃O_7-δ; LaNiO₃; Ni alloy-based superconducting tapes; Ni-based coated conductors; SrRuO₃; coated conductors; conductive buffer layers; current-voltage relations; electrical stability; fabrication; fully conductive RABiTS architecture; insulating substrates; metallic cap layer; multilayers; overlayers; textured Ni tapes; thermal stability; Buffer layers; Conductors; Current measurement; Fabrication; Nickel alloys; Prototypes; Stability analysis; Superconducting films; Thermal conductivity; Thermal stability;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919770

Filename

919770