• DocumentCode
    1076576
  • Title

    Fabrication of High- Jc NdBa2Cu3O7−δ and BaZrO3-doped

  • Author

    Wee, S.H. ; Goyal, A. ; Martin, P.M. ; Li, J. ; Paranthaman, M. ; Heatherly, L.

  • Author_Institution
    Oak Ridge Nat. Lab., Oak Ridge
  • Volume
    17
  • Issue
    2
  • fYear
    2007
  • fDate
    6/1/2007 12:00:00 AM
  • Firstpage
    3672
  • Lastpage
    3674
  • Abstract
    Critical current densities (Jc) over 2 MA/cm2 have been obtained for epitaxial NdBa2Cu3O7-delta (NdBCO) films deposited via pulsed laser deposition on RABiTS having the configuration of Ni - 3at.%W /Y2O3/YSZ/CeO2. Compared to YBa2Cu3O7-delta (YBCO) films on RABiTS, enhanced Jc in applied magnetic fields is observed for the NdBCO films. Further improvement in in-field Jc is achieved by incorporation of self-assembled BaZrO3 (BZO) nanodots within the NdBCO film. At intermediate fields Jc varies as Jc ~ H-alpha, with alpha values for un-doped and BZO-doped films being ~0.43 and ~0.37 respectively, significantly lower than alpha ~ 0.52 for pure YBCO films. Combined effects of better pinning in NdBCO films over YBCO films as well as creation of columnar defects via incorporation of self-assembled BZO nanodots, result in significant improvement over pure YBCO films on RABiTS.
  • Keywords
    barium compounds; critical current density (superconductivity); crystal defects; flux pinning; high-temperature superconductors; nanostructured materials; neodymium compounds; pulsed laser deposition; quantum dots; rolling; self-assembly; sodium compounds; superconducting epitaxial layers; surface texture; NdBa2Cu3O7-delta; NdBa2Cu3O7-delta:BaZrO3; columnar defects; critical current density; epitaxial film deposition; flux pinning; nanodots; pulsed laser deposition; rolling-assisted biaxially textured substrates; self-assembly; Critical current density; Fabrication; High temperature superconductors; Magnetic fields; Magnetic films; Optical pulses; Pulsed laser deposition; Self-assembly; Superconducting films; Yttrium barium copper oxide; ${rm BaZrO}_{3}$ nanodots; ${rm NdBa}_{2}{rm Cu}_{3}{rm O}_{7-delta}$ films; RABiTS; critical current density; flux-pinning;
  • fLanguage
    English
  • Journal_Title
    Applied Superconductivity, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    1051-8223
  • Type

    jour

  • DOI
    10.1109/TASC.2007.899372
  • Filename
    4278317
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1076576