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Session Q09 - HTSC: STRUCTURES AND DEFECTS
Mixed session, Friday morning, March 24, 8:00
Ballroom A5, San Jose Convention Center
^18O has been used to replace ^16O on the copper oxygen chains of (100) -oriented thin film YBCO superconductors. Oxygen replacements are particularly effective when oxygen diffusion occurs along the copper-oxygen (ab-) plane, a condition ideally met by the (110) -oriented YBCO films which have ab-planes aligned perpendicular to the surface of a (110) -oriented SrTiO_3 substrate. In this study, chain-oxygen associated lattice defects were produced by various particle bombardment methods which discriminate ^18O from ^16O . Ion channeling techniques were used to characterize the defects in realtion to the flux-pining strength. The effectiveness of generating desired defects will be compared with that archived in c-oriented films deposited on (001) -oriented SrTiO_3 substrates.