Title :
High-T/sub c/ coated conductors-performance of meter-long YBCO/IBAD flexible tapes
Author :
Foltyn, S.R. ; Arendt, P.N. ; Dowden, P.C. ; DePaula, R.F. ; Groves, J.R. ; Coulter, J.Y. ; Quanxi Jia ; Maley, M.P. ; Peterson, D.E.
Author_Institution :
Supercond. Technol. Center, Los Alamos Nat. Lab., NM, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
One meter long tapes based on 50-100 /spl mu/m thick by 1 cm wide nickel alloy substrates have been coated in a continuous process with a textured yttria-stabilized zirconia layer by ion beam-assisted deposition, followed by a 1-2 /spl mu/m thick layer of YBCO by pulsed laser deposition. The best result to date is a tape with a critical current (I/sub c/) at 75 K of 96 A over an 87 cm measurement length. The overall critical current density and engineering current density are 1 MA/cm/sup 2/ and 10 kA/cm/sup 2/, respectively. Using a special probe, individual I-V curves were generated for each centimeter of tape length in order to investigate longitudinal uniformity of the transport properties: the highest and lowest I/sub c/ values fall within a range of /spl plusmn/25%.
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; pulsed laser deposition; superconducting tapes; superconducting thin films; yttrium compounds; 1 cm; 1 m; 50 to 100 mum; 75 K; 96 A; YBCO/IBAD flexible tapes; YBa/sub 2/Cu/sub 3/O/sub 7/; critical current; high temperature superconductor; ion beam-assisted deposition; pulsed laser deposition; textured yttria-stabilized zirconia layer; Critical current; Critical current density; Current density; Current measurement; Length measurement; Nickel alloys; Optical pulses; Probes; Pulsed laser deposition; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
