Synthesis and properties of Tl–Ba–Ca–Cu–O superconductors

We review the synthesis methods and properties of single crystal, powder, and thin film TlBaCaCuO high-temperature superconducting (Tl-HTS) materials. With transition temperatures ≥ 100 K for several compounds, Tl-HTS materials present real opportunities for applications above 77 K. Experiments usin...

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Bibliographic Details
Published in:Journal of materials research 1997-11, Vol.12 (11), p.2825-2854
Main Authors: Siegal, M. P., Venturini, E. L., Morosin, B., Aselage, T. L.
Format: Article
Language:English
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Summary:We review the synthesis methods and properties of single crystal, powder, and thin film TlBaCaCuO high-temperature superconducting (Tl-HTS) materials. With transition temperatures ≥ 100 K for several compounds, Tl-HTS materials present real opportunities for applications above 77 K. Experiments using (1) single crystals: determined precise structural parameters and identified the complex Tl1+–Tl3+ equilibrium model; (2) powders: studied the complex thermodynamic phase diagram; and (3) epitaxial films: studied fundamental properties such as electron pair symmetry and the effect of controlled extrinsic defects on flux pinning strength, as well as providing the large-area surfaces required for device applications.
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.1997.0378