Superconductivity of Tl-Sr-Ca-Cu-O system in relation to Tl-Ba-Ca-Cu-O and Bi-Sr-Ca-Cu-O systems

It was found that Tl-Sr-Ca-Cu-O system gives rise to at least two superconducting phases, a high- T c phase at 100 K and a low- T c phase at about 75 K. The two phases are isostructural to those of Bi-Sr-Ca-Cu-O system. Comparing the T c 's and crystal structures of the Tl and Bi systems, it wa...

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Veröffentlicht in:Japanese Journal of Applied Physics 1988-11, Vol.27 (11), p.2062-2064
Hauptverfasser: MATSUDA, S, TAKEUCHI, S, SOETA, A, SUZUKI, T, AIHARA, K, KAMO, T
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Sprache:eng
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Zusammenfassung:It was found that Tl-Sr-Ca-Cu-O system gives rise to at least two superconducting phases, a high- T c phase at 100 K and a low- T c phase at about 75 K. The two phases are isostructural to those of Bi-Sr-Ca-Cu-O system. Comparing the T c 's and crystal structures of the Tl and Bi systems, it was suggested that T c is mainly determined by the combination of two alkaline earth elements, i.e., Sr/Ca or Ba/Ca, when the repetition unit in the layered perovskites is equal.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.27.2062