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Title: Fabrication and Characterization of YBCO Coated Conductors by Inclined Substrate Deposition

Abstract

Inclined substrate deposition (ISD) is an effective method for rapid fabrication of high-quality template layers for YBCO-coated conductors. We have deposited biaxially textured ISD-MgO films on flexible metallic tapes in a reel-to-reel system by electron-beam evaporation at rapid deposition rates, 2-10 nm{center_dot}s-1. Strontium ruthenium oxide (SRO) buffer and YBCO films were grown by pulsed laser deposition (PLD). Pole figure analysis of a meter-long ISD-MgO tape was carried out by X-ray diffraction using a Bruker's D8 DISCOVER equipped with GADDS (general area detection diffraction system). The c-axis of the ISD-MgO film was tilted away from substrate normal. A full-width at half maximum (FWHM) of {approx_equal}10 deg. was observed from the {phi}-scan of the MgO (002) diffraction measured on samples deposited with 35 deg. inclination angle. Surface morphology measured by atomic force microscopy revealed a roof-tile shaped structure for the ISD-MgO films. Through the use of the SRO buffer, biaxial alignment in the YBCO film deposited on the ISD-MgO template was improved. The {phi}-scan FWHM was 5.8 deg. for the YBCO (005) diffraction. We have measured the critical transition temperature Tc = 91 K and transport critical current density Jc >1.6x106 A{center_dot}cm-2 at 77 K in self-field on a SRO-buffered YBCO filmmore » grown with ISD-MgO architecture.« less

Authors:
;  [1]; ;  [2]
  1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  2. UES, Inc., Dayton, Ohio 45432 (United States)
Publication Date:
OSTI Identifier:
20800189
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 824; Journal Issue: 1; Conference: Cryogenic engineering conference, Keystone, CO (United States), 29 Aug - 2 Sep 2005; Other Information: DOI: 10.1063/1.2192418; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMIC FORCE MICROSCOPY; BARIUM COMPOUNDS; CRITICAL CURRENT; CUPRATES; CURRENT DENSITY; ELECTRON BEAMS; ENERGY BEAM DEPOSITION; FABRICATION; HIGH-TC SUPERCONDUCTORS; LASER RADIATION; LAYERS; MAGNESIUM OXIDES; MORPHOLOGY; PULSED IRRADIATION; RUTHENIUM OXIDES; STRONTIUM OXIDES; SUBSTRATES; SUPERCONDUCTING FILMS; SUPERCONDUCTIVITY; TRANSITION TEMPERATURE; X-RAY DIFFRACTION; YTTRIUM COMPOUNDS

Citation Formats

Ma, B., Balachandran, U., Xu, Y., and Bhattacharya, R.. Fabrication and Characterization of YBCO Coated Conductors by Inclined Substrate Deposition. United States: N. p., 2006. Web. doi:10.1063/1.2192418.
Ma, B., Balachandran, U., Xu, Y., & Bhattacharya, R.. Fabrication and Characterization of YBCO Coated Conductors by Inclined Substrate Deposition. United States. doi:10.1063/1.2192418.
Ma, B., Balachandran, U., Xu, Y., and Bhattacharya, R.. Fri . "Fabrication and Characterization of YBCO Coated Conductors by Inclined Substrate Deposition". United States. doi:10.1063/1.2192418.
@article{osti_20800189,
title = {Fabrication and Characterization of YBCO Coated Conductors by Inclined Substrate Deposition},
author = {Ma, B. and Balachandran, U. and Xu, Y. and Bhattacharya, R.},
abstractNote = {Inclined substrate deposition (ISD) is an effective method for rapid fabrication of high-quality template layers for YBCO-coated conductors. We have deposited biaxially textured ISD-MgO films on flexible metallic tapes in a reel-to-reel system by electron-beam evaporation at rapid deposition rates, 2-10 nm{center_dot}s-1. Strontium ruthenium oxide (SRO) buffer and YBCO films were grown by pulsed laser deposition (PLD). Pole figure analysis of a meter-long ISD-MgO tape was carried out by X-ray diffraction using a Bruker's D8 DISCOVER equipped with GADDS (general area detection diffraction system). The c-axis of the ISD-MgO film was tilted away from substrate normal. A full-width at half maximum (FWHM) of {approx_equal}10 deg. was observed from the {phi}-scan of the MgO (002) diffraction measured on samples deposited with 35 deg. inclination angle. Surface morphology measured by atomic force microscopy revealed a roof-tile shaped structure for the ISD-MgO films. Through the use of the SRO buffer, biaxial alignment in the YBCO film deposited on the ISD-MgO template was improved. The {phi}-scan FWHM was 5.8 deg. for the YBCO (005) diffraction. We have measured the critical transition temperature Tc = 91 K and transport critical current density Jc >1.6x106 A{center_dot}cm-2 at 77 K in self-field on a SRO-buffered YBCO film grown with ISD-MgO architecture.},
doi = {10.1063/1.2192418},
journal = {AIP Conference Proceedings},
number = 1,
volume = 824,
place = {United States},
year = {Fri Mar 31 00:00:00 EST 2006},
month = {Fri Mar 31 00:00:00 EST 2006}
}
  • No abstract prepared.
  • Highly textured MgO films were grown by the inclined-substrate deposition (ISD) technique at a high deposition rate. A columnar grain with a roofing-tile-shaped surface was observed in these MgO films. X-ray pole figure, and {phi}- and {omega}-scan were used to characterize in-plane and out-of-plane textures. MgO films deposited when the incline angle {alpha} was 55 and 30 degrees exhibited the best in-plane and out-of-plane texture, respectively. High-quality YBCO films were epitaxially grown on ISD-MgO-buffered Hastelloy C substrates by pulsed laser deposition. {Tc}=88 K, with sharp transition, and j{sub c} values of {approx}2x10{sup 5} A/cm{sup 2} at 77 K in zeromore » field were observed on films 5 mm wide and 1 cm long. This work has demonstrated that biaxially textured ISD MgO buffer layers deposited on metal substrates are excellent candidates for fabrication of high-quality YBCO coated conductors.« less
  • No abstract prepared.
  • 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 bymore » 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.« less