J. Phys. IV France 11 (2001) Pr11-175-Pr11-179
Hg-cuprate thin films prepared using Re and fluorides based precursor thin filmsS. Chromik1, D. De Barros2, V. Strbik1, P. Odier2, A. Sin2, F. Hanic3 and I. Kostic4
1 Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska Cesta 9, 84239 Bratislava, Slovakia
2 Laboratoire de Cristallographie, CNRS, 25 avenue des Martyrs, BP. 166, 38042 Grenoble cedex 09, France
3 Institute of Measurement Science, Slovak Academy of Sciences, Dubravska Cesta 9, 84219 Bratislava, Slovakia
4 Institute of Informatics, Slovak Academy of Sciences, Dubravska Cesta 9, 84237 Bratislava, Slovakia
We present the preparation, structural and electrical properties of Hg-based superconducting thin films prepared by two step process from different precursor films. Ba-Ca-Cu-(O,F) precursor films were prepared by sequential evaporation method and Re-Ba-Ca-Cu-O precursor films by high-pressure sputtering on CeO2 buffered R-plane sapphire substrates. Then, Hg-Re-Ba-Ca-Cu-O pellets as a source of Hg-vapour were applied in heat-treatment. The Hg cuprate thin films with maximum zero resistance critical temperature Tco = 119.8 K were continuous with a sufficient adhesion for patterning. In the case of the films prepared by Re-doped precursor film we observed uniform surface morphology and superconducting properties.
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