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Growth and properties of YBCO-coated conductors fabricated by inclined-substrate deposition

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8 Author(s)
B. Ma ; Energy Technol. Div., Argonne Nat. Lab., IL, USA ; K. K. Uprety ; R. E. Koritala ; B. L. Fisher
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YBCO-coated conductors with high current-carrying capability are desirable for electric power transmission applications. Inclined-substrate deposition (ISD) is capable of producing high-quality biaxially textured template films, which are important for fabrication of YBCO-coated conductors. We have grown biaxially textured ISD-MgO template films on flexible metallic substrates at deposition rates of 2-10 nm/sec. Columnar grains with a roof-tile-shaped surface structure were observed on the ISD-MgO films. X-ray pole figure analysis revealed that the ISD-MgO film is biaxially textured and its c-axis is titled at an angle from the substrate normal. Strontium ruthenium oxide (SRO) buffer films were epitaxially grown on ISD-MgO by pulsed laser deposition prior to the deposition of YBCO. Low φ-scan full-width at half maximum (FWHM) values of 6° and 7° were observed for YBCO and SRO, respectively. Tc of 91 K with a sharp transition and transport Jc over 1.4 MA/cm2 at 77 K in self-field were measured on YBCO coated conductors grown with ISD MgO architectures using a SRO buffer.

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IEEE Transactions on Applied Superconductivity  (Volume:15 ,  Issue: 2 )