Title :
Tb and Ce doped Y123 films processed by pulsed laser deposition
Author :
Kell, Joseph W. ; Haugan, Timothy J. ; Locke, Mary Frances ; Barnes, Paul N.
Author_Institution :
Air Force Res. Lab., Wright-Patterson AFB, OH, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
To evaluate possible flux pinning enhancement in YBa2Cu3O7-z (Y123) films due to partial rare-earth ion substitutions, Ce and Tb doping are studied. Bulk ceramic targets of varying compositions (Y1-xRExBa2Cu3O7-z) were made with several doping levels (x=0.001 to 0.1, RE=Ce or Tb) by using regular solid-state reaction and sintering procedures. These targets were used to deposit Ce and Tb doped YBCO films onto SrTiO3 single crystal substrates by pulsed laser ablation. Doped YBCO films were characterized for Tc, magnetic field dependence of Jc (at 77 K), microstructure, and other properties. The results are compared to undoped YBCO films processed in similar manner.
Keywords :
barium compounds; cerium compounds; flux pinning; high-temperature superconductors; pulsed laser deposition; superconducting thin films; terbium compounds; yttrium compounds; 77 K; Y1-xCexBa2Cu3O7-z; Y1-xTbxBa2Cu3O7-z; doped Y123 films; flux pinning enhancement; high-temperature superconductors; magnetic field dependence; magnetic field measurement; partial rare-earth ion substitutions; pulsed laser deposition; sintering procedure; solid-state reaction; superconducting materials; thin films; Ceramics; Crystal microstructure; Doping; Flux pinning; Laser ablation; Magnetic films; Optical pulses; Pulsed laser deposition; Solid state circuits; Yttrium barium copper oxide; High-temperature superconductors; magnetic field measurement; superconducting materials; thin films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849415
