Preparation of oriented high‐ T c Tl‐Ca‐Ba‐Cu‐O thin films from co‐condensed amorphous Ca‐Ba‐Cu alloys by post‐deposition oxidation and Tl diffusion
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Single-phase Tl2Ca1Ba2Cu2O 8 thin films with zero-resistance transition temperature up to 100 K have been prepared on single-crystal MgO substrates from codeposited Ca-Ba-Cu amorphous metallic alloy precursors. After thermal oxidation of the metallic alloy film, Tl from Tl2O3 was vapor deposited and diffused into the resulting mixed metal oxide during a rapid high-temperature anneal. The films prepared in this process are highly oriented with the c axis normal to the substrate.
author list (cited authors)
Naugle, D. G., Wang, P. S., Shao, X. Y., & Hermann, A. M.