In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 27, No. 11A ( 1988-11-01), p. L2048-
Abstract:
Superconductors Bi-Ca-Sr-Cu-O containing high- T c (110 K) and/or low- T c (80 K) phases were investigated by analytical electron microscopy. In the sample containing the high- T c phase, various stacking sequences formed with 2, 3 and 4 perovskite layers were observed by a lattice imaging technique. From EDX analysis, a considerable variation of composition with a higher Cu atomic fraction than that of low- T c phase was detected. The structure of 3 perovskite layers is considered to be responsible for a superconducting transition at 110 K. A discrepancy between a volume fraction of the structure containing 3 perovskite layers and that of high- T c phase expected from the magnetization experiment is discussed. Despite the differences of chemical composition and stacking period along the c -axis, a similar structural modulation with an incommensurate period along the b -axis was equally found in the high- T c phase as the low- T c phase.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.27.L2048
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1988
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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