Influence of the buffer layer on the growth of superconducting films based on mercury

Thin films of mercury based superconductors were prepared on R-plane sapphire with a CeO2 buffer layer by a two-step process involving the deposition of the Hg-free precursor and ex situ mercuration in a sealed quartz tube. We used CeO2 buffer layers of different thicknesses to study their influence...

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Bibliographic Details
Published in:Superconductor science & technology 2007-10, Vol.20 (10), p.900-903
Main Authors: Valeriánová, M, Odier, P, Chromik, Š, Štrbík, V, Polák, M, Kostič, I
Format: Article
Language:English
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Summary:Thin films of mercury based superconductors were prepared on R-plane sapphire with a CeO2 buffer layer by a two-step process involving the deposition of the Hg-free precursor and ex situ mercuration in a sealed quartz tube. We used CeO2 buffer layers of different thicknesses to study their influence on the phase composition and properties of the final films. We succeeded in preparing a Hg-1223 superconducting phase on thin CeO2 buffered (10 nm) R-plane sapphire with a critical temperature TC0 up to 122.5 K and critical current density JC up to 4 X 105 A cm-2.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/20/10/002