Further evidence for the presence of c=38.2 Å phase in a Bi-Ca-Sr-Cu-O superconductor

Publication Type

Journal Article

Authors

DOI

Abstract

Results of high-resolution electron microscopy, convergent beam electron microscopy, and x-ray microanalysis on the high Tc phase are reported. Local inhomogeneities in the structure and composition have been observed along the c direction. Both c=30.56 Å (8ap) and c=38.2 Å (10ap) have been observed inside the same grain. The regions with the larger c parameter correspond to regions with higher Ca and Cu concentration suggesting that the range of transition temperatures observed (85 to 115 K) is due to the coexistence of such regions of c=38.2 Å and c=30.56 Å.

Journal

Applied Physics Letters

Volume

53

Year of Publication

1988

ISSN

00036951

Notes

cited By 17

Research Areas