Inclined substrate deposition of magnesium oxide for YBCO-coated conductors.

Ma, B; Li, M; Fisher, B L; Koritala, R E; Dorris, S E; Maroni, V A; Balachandran, U

doi:10.1002/9781118405932.ch3

Title: Inclined substrate deposition of magnesium oxide for YBCO-coated conductors.

Conference · Fri Apr 26 00:00:00 EDT 2002

DOI:https://doi.org/10.1002/9781118405932.ch3· OSTI ID:795040

Ma, B; Li, M; Fisher, B L; Koritala, R E; Dorris, S E; Maroni, V A; Balachandran, U

Thin films of YBa{sub 2}Cu{sub 3}O{sub 7-x} (YBCO) were grown on MgO buffered metallic substrates by pulsed laser deposition (PLD). The MgO buffer films, which provide the initial biaxial texture, had been grown on polished Hastelloy C276 (HC) tapes using inclined substrate deposition (ISD). The ISD process is promising for the fabrication of coated superconductor wires because it produces biaxially textured template films on nontextured substrate at high deposition rates. Biaxially aligned MgO films were deposited at deposition rates of 20 to 100 {angstrom}/sec. The buffer films were deposited on these template films before ablation of the YBCO films by PLD. The microstructure was studied by scanning electron microscopy and atomic force microscopy. X-ray pole figure analysis and {phi}- and {omega}-scans were used for texture characterization. Good in- and out-of-plane textures were observed on the ISD MgO films ({approx}1.5 {micro}m thick). The full width at half maximums were 9.2{sup o} for the MgO (002) {phi}-scan and 5.4{sup o} for the {omega}-scan. Cube-on-cube epitaxial growth of yttria-stabilized zirconia (YSZ) and ceria (CeO{sub 2}) films on the ISD MgO films was also achieved by PLD. A superconducting critical temperature of 90 K, with a sharp transition, and transport critical current density of >2.5 x 10{sup 5} A/cm{sup 2} were obtained on a 0.5-{micro}m-thick, 0.5-cm-wide, and 1-cm-long YBCO film with MgO buffer layer at 77 K in self-field.

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Research Organization:: Argonne National Lab., IL (US)

Sponsoring Organization:: US Department of Energy (US)

DOE Contract Number:: W-31-109-ENG-38

OSTI ID:: 795040

Report Number(s):: ANL/ET/CP-107480; TRN: US200211%%93

Resource Relation:: Conference: 104th Annual Meeting and Exposition of the American Ceramic Society, St. Louis, MO (US), 04/28/2002--05/01/2002; Other Information: PBD: 26 Apr 2002

Country of Publication:: United States

Language:: English

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Title: Inclined substrate deposition of magnesium oxide for YBCO-coated conductors.

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