Critical currents in real HTSC materials

It is shown that in Y Ba 2Cu 3O 7 single crystals and highly c-axis oriented thin films the similar screw dislocations induced cooperative mechanism of growth can be observed. Such growth is accompanied by volume rotations of microblocks which result in formation of low-angle subgrain boundaries. Lo...

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Bibliographic Details
Published in:Journal of alloys and compounds 1993-05, Vol.195, p.387-394
Main Author: Pan, V.M.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Superconducting films and low-dimensional structures
Superconductivity
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Summary:It is shown that in Y Ba 2Cu 3O 7 single crystals and highly c-axis oriented thin films the similar screw dislocations induced cooperative mechanism of growth can be observed. Such growth is accompanied by volume rotations of microblocks which result in formation of low-angle subgrain boundaries. Low angle boundaries appeared to be consisting of edge dislocations arrays (walls). Dislocation density of such particular structures actually defines values of critical current density in real HTSC materials.
ISSN:0925-8388
1873-4669
DOI:10.1016/0925-8388(93)90763-D