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Grain boundaries and defects in superconducting Bi-Sr-Ca-Cu-O ceramics (1990)

Ramesh, R. ; Bagley, B. G. ; Tarascon, J. M. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 67 (1990), S. 379-387

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Defects and structural interfaces in superconducting Bi-Sr-Ca-Cu-O have been characterized by transmission electron microscopy. The superconducting phase exhibits frequent variations in the stacking sequence (polytypoids). Dislocations, observed inside the grains, either introduce or accommodate the shear in the a-b plane and the local composition fluctuations. In general, the grains exhibit a platelike morphology with the a-b plane as the grain boundary plane. Grain boundaries along the short edge are generally disordered, whereas those near the long edge generally have a thin layer of the lower Tc polytypoid. Coherent intragranular boundaries are also observed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.345266

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