Synthesis and properties of Tl–Ba–Ca–Cu–O superconductors
- 1 November 1997
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 12 (11) , 2825-2854
- https://doi.org/10.1557/jmr.1997.0378
Abstract
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.Keywords
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