EXAFS Study on the Local Structure of Cu in Bi-Pb-Sr-Ca-Cu-O Systems
We have conducted an EXAFS study of two kinds of Pb-added Bi-Sr-Ca-Cu-O superconductors with different compositions having different T c . Copper in the specimen, which mainly consists of the high T c phase (Bi 2 Sr 2 Ca 2 Cu 3 O y ), has nearly the same coordination number as that of the specimen w...
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| Veröffentlicht in: | Japanese Journal of Applied Physics 1990-08, Vol.29 (8A), p.L1419 |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | We have conducted an EXAFS study of two kinds of Pb-added Bi-Sr-Ca-Cu-O superconductors with different compositions having different
T
c
. Copper in the specimen, which mainly consists of the high
T
c
phase (Bi
2
Sr
2
Ca
2
Cu
3
O
y
), has nearly the same coordination number as that of the specimen which has a nearly equal amount of the high
T
c
phase and the low
T
c
phase (Bi
2
Sr
2
CaCu
2
O
y
). The former specimen showed a smaller Debye-Waller parameter of in-plane Cu-O bonds than did the latter specimen, both at room temperature and at 77 K. |
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| ISSN: | 0021-4922 1347-4065 |
| DOI: | 10.1143/JJAP.29.L1419 |