Title :
Critical currents Ic(77 K)>350 A/cm-width achieved in ex situ YBCO coated conductors using a faster conversion process
Author :
Feenstra, R. ; Gapud, A.A. ; List, F.A. ; Specht, E.D. ; Christen, D.K. ; Holesinger, T.G. ; Feldmann, D.M.
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
Implementation of improved processing for BaF2 ex situ YBCO coatings from e-beam evaporated precursors enables faster conversion with rates up to 12 Å/s and critical currents Ic at 77 K greater than 350 A/cm-width on a RABiTS template. Details of the faster processing are described and compared to an earlier slower process. A linear relation between Ic and YBCO layer thickness provides evidence of new opportunities to further improve Ic.
Keywords :
barium compounds; critical currents; electron beam deposition; flux pinning; high-temperature superconductors; substrates; yttrium compounds; 77 K; BaF2 ex situ process; BaF2; RABiTS template; YBCO coated conductors; YBCO coatings; YBCO layer thickness; YBaCuO; conversion process; critical currents; e-beam evaporated precursors; thickness dependent effects; vortex pinning; Atherosclerosis; Coatings; Conductors; Critical current; Geometry; Laboratories; Substrates; Superconducting epitaxial layers; Superconducting films; Yttrium barium copper oxide; YBCO coated conductors; critical currents; thickness dependent effects; vortex pinning;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848217
