Superconducting thallium cuprate thin films; Processing and characterisation

L. G. Johansson, V. Langer, E. A. Stepantsov, A. Litvinchuk, L. Borjesson, Y. F. Chen, T. Claeson, Z. G. Ivanov, E. Olsson, A. Y. Tzalenchuk

Research output: Chapter in Book/Report/Conference proceedingOther contribution


Superconducting epitaxial Tl2Ba2CaCu2O8 (Tl-2212) thin films are reproducibly synthesised on single-crystal LaAlO3 substrates by an ex-situ process using prefilms deposited by laser ablation and treating with Tl2O(g) at 730-875 degrees C under quasi-equilibrium conditions. The influence of the composition of the Tl2O source on film properties is investigated, the best films being produced using Tl-2212 with a 2% excess of Tl2O3. Films prepared at optimum conditions with respect to Tl2O source, annealing temperature and precursor target composition are optically smooth, c-axis oriented and epitaxial, containing low levels of impurity phases. T-c's range between 105 and 108K with Delta T-c
Original languageEnglish
Title of host publicationApplied Superconductivity 1995, Vols. 1 and 2: Vol 1: Plenary Talks and High Current Applications; Vol 2: Small Scale Applications
Number of pages4
Publication statusPublished - 1995

Publication series

NameInstitute of Physics Conference Series

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