Buffer Layer R and D for YBCO Coated Conductor Composite Wires

Buffer layers play a key role in the YBa2Cu3O7-{delta} (YBCO) coated conductor composite wire technology. The important buffer layer characteristics are: these buffers should prevent metal diffusion into the superconductor from the substrate; possibly act as oxygen diffusion barriers; should be smoo...

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Bibliographic Details
Published inAIP conference proceedings Vol. 711; no. 1
Main Authors Paranthaman, M. Parans, Sathyamurthy, S., Aytug, T., Leonard, K.J., Goyal, A., Zhai, H.Y., Kroeger, D.M., Christen, D.K., Li, X., Verebelyi, D.T., Schoop, U., Thieme, C., Kodenkandath, T., Zhang, W., Rupich, M.W., Ericson, R.E.
Format Journal Article
LanguageEnglish
Published United States 28.06.2004
Subjects
BARIUM COMPOUNDS
BUFFERS
CERIUM COMPOUNDS
CUPRATES
DEPOSITION
DIFFUSION BARRIERS
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LAYERS
MANGANESE COMPOUNDS
MATERIALS SCIENCE
NICKEL
OXYGEN
SOLUTIONS
SPUTTERING
TUNGSTEN
VAPOR PHASE EPITAXY
VAPORS
WIRES
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
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Summary:Buffer layers play a key role in the YBa2Cu3O7-{delta} (YBCO) coated conductor composite wire technology. The important buffer layer characteristics are: these buffers should prevent metal diffusion into the superconductor from the substrate; possibly act as oxygen diffusion barriers; should be smooth, continuous, crack-free, highly aligned and dense. In order to develop low-cost alternative buffer layer architectures to the standard architecture of YBCO/CeO2/YSZ/Y2O3/Ni/Ni-W, LaMnO3 (LMO) and La2Zr2O7 (LZO) buffers were chosen for this study. These buffers were grown epitaxially on biaxially textured and strengthened Ni-W3% metal tapes by scalable vapor and/or solution techniques. LaMnO3 buffers were grown epitaxially on Ni-W substrates by rf sputtering, and La2Zr2O7 buffers were grown by a Metal-Organic Deposition (MOD). Detailed microstructural characterizations indicate that both of these buffers were excellent Ni diffusion barrier layers and high current YBCO films were grown on both LMO and LZO buffer templates.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.1774625