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

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.4093· OSTI ID:6926246

Lee, J; Laughlin, D E ^[1]; Nam, S ^[2]

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1. Department of Metallurgical Engineering Department of Materials Science, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (USA)
2. University Research Center, Wright State University, Dayton, Ohio 45435 (USA) WRPC/POOC, Bldg. 450, Wright-Patterson Air Force Base, Ohio 45433 (USA)

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 {mu}m), but they are frequently divided into subgrains by low-angle grain boundaries. Furthermore, evidence is found for discommensurate walls associated with incommensuration along the {ital b} axis.

• OSTI ID: 6926246
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:7; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELECTRON MICROSCOPY
GRAIN SIZE
LINE DEFECTS
MICROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SCANNING ELECTRON MICROSCOPY
SIZE
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
TWINNING