Direct observation of discommensurate walls in Bi-Ca-Sr-Cu-O superconductors

J.-W. Lee; D. E. Laughlin; S. Nam

doi:10.1103/PhysRevB.41.4093

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Direct observation of discommensurate walls in Bi-Ca-Sr-Cu-O superconductors

J.-W. Lee, D. E. Laughlin, S. Nam

DOI 10.1103/PhysRevB.41.4093 · Physical Review B

T1

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Abstract

The dislocations and twins in superconducting Bi-Ca-Sr-Cu-O samples are examined by scanning electron microscopy and transmission electron microscopy. The results indicate that these defects are inherent to the materials. The grains are large in size (1–10 μm), but they are frequently divided into subgrains by low-angle grain boundaries. Furthermore, evidence is found for discommensurate walls associated with incommensuration along the b axis.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
BiSrCaCu2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
BiSrCaCu3O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown