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(001) grain boundaries and critical currents

Essers, M ; Kes, P H ; Fu, W T ; Zandbergen, H W

Superconductor science & technology, 1993-04, Vol.6 (4), p.250-256 [Periódico revisado por pares]

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Título:
(001) grain boundaries and critical currents
Autor: Essers, M ; Kes, P H ; Fu, W T ; Zandbergen, H W
Assuntos: Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Exact sciences and technology ; Physics ; Properties of type I and type II superconductors ; Superconductivity
É parte de: Superconductor science & technology, 1993-04, Vol.6 (4), p.250-256
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Magnetization measurements and high resolution electron microscopy (HREM) have been carried out on the series Y sub(1-x)Ca sub(x)Ba sub(2-x)La sub(x)Cu sub(3)O sub(7- delta ) to determine the correlation between critical current and (001) grain boundaries. Substituting Ca for Y reduces the fraction of (001) grain boundaries and increases the fraction of grain boundaries other than (001). The critical current increases linearly with the fraction of clean grain boundaries other than the (001) boundaries. It is concluded that the (001) grain boundaries in YBa sub(2)Cu sub(3)O sub(7) act as weak links. It is argued that the atomic structure of the interface is responsible. In addition it is observed that the intragrain critical current decreases with increase of x.
Editor: Bristol: IOP Publishing
Idioma: Inglês

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