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 |
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Hauptverfasser: | , , , , , |
Format: | Artikel |
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. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.27.2062 |