Tb and Ce Doped Y123 Films Processed by Pulsed Laser Deposition
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
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To evaluate possible flux pinning enhancement in YBa2Cu3O77-xY123 films due to partial rare-earth ion substitutions, Ce and Tb doping are studied. Bulk ceramic targets of varying compositions Y1-xRExBa2Cu3O77-x 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.
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