• DocumentCode
    1120783
  • Title

    Electrodeposited Biaxially Textured Buffer Layers for YBCO Superconductors

  • Author

    Bhattacharya, Raghu ; Phok, Sovannary ; Zhao, Wenjun ; Norman, Andrew

  • Author_Institution
    Nat. Renewable Energy Lab., Golden, CO, USA
  • Volume
    19
  • Issue
    3
  • fYear
    2009
  • fDate
    6/1/2009 12:00:00 AM
  • Firstpage
    3451
  • Lastpage
    3454
  • Abstract
    Non-vacuum electrodeposition (ED) was used to prepare simplified Gd2O3/Gd2Zr2O7 and CeO2/Gd2Zr2O7 buffer layers on a Ni-W substrate. Post-annealing conditions of electrodeposited precursor films were optimized to obtain high-quality biaxially textured buffer layers. The buffer layers were characterized by X-ray diffraction, optical profiling, and transmission electron microscopy (TEM). The effect of the cap layer thickness on the surface morphology and texture of the buffers was also studied. The microstructure of CeO2/Gd2Zr2O7 was analysed and compared to Gd2O3/Gd2Zr2O7. The high-resolution TEM shows biaxially textured crystalline elctrodeposited Gd2O3 and CeO2 cap layers on the electrodeposited Gd2Zr2O7 layers without any defects. YBa2Cu3O7-delta (YBCO) superconductor was deposited by pulsed laser deposition (PLD) on the simplified ED-Gd2O3/Gd2Zr2O7 and ED-CeO2/Gd2Zr2O7 buffers. Transport current density of 3.3 MA/cm2 at 77 K was obtained for PLD YBCO deposited on ED-Gd2O3/Gd2Zr2O7 buffer layers.
  • Keywords
    X-ray diffraction; annealing; barium compounds; buffer layers; cerium compounds; current density; electrodeposition; gadolinium compounds; high-temperature superconductors; nickel alloys; pulsed laser deposition; superconducting thin films; surface morphology; surface texture; transmission electron microscopy; tungsten alloys; yttrium compounds; Ni-W substrate; NiW; TEM; X-ray diffraction; YBCO films; YBa2Cu3O7-delta-CeO2-Gd2Zr2O7-NiW; YBa2Cu3O7-delta-Gd2O3-Gd2Zr2O7-NiW; electrodeposited biaxially textured buffer layers; microstructure; nonvacuum electrodeposition; optical profiling; post-annealing; pulsed laser deposition; surface morphology; surface texture; temperature 77 K; transmission electron microscopy; transport current density; ${rm Gd}_{2}{rm O}_{3}$; ${rm CeO}_{2}$; ${rm Gd}_{2}{rm Zr}_{2}{rm O}_{7}$ ; Buffer layers; YBCO; electrodeposition; pulsed laser deposition;
  • fLanguage
    English
  • Journal_Title
    Applied Superconductivity, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    1051-8223
  • Type

    jour

  • DOI
    10.1109/TASC.2009.2019603
  • Filename
    5152914
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1120783