The Superconducting Properties of [001] Twist Boundaries in a Bi-Sr-Ca-Cu-O Superconductor
- 1 July 1992
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 31 (7B) , L942-945
- https://doi.org/10.1143/jjap.31.l942
Abstract
Critical temperature (T c) and critical current density (J c) of [001]-twist bicrystals of the Bi2Sr2CaCu2O x were measured as a function of twist angle. The resistivity-temperature curve of the bicrystal showed a long tail, which was enhanced as the applied current increased. The J c values of the bicrystals are 3-4 orders of magnitude lower than that of single crystals but relatively high J c values were obtained for bicrystals at Σ5 and Σ17 coincidence orientation relationships. It was indicated that the [001] twist boundary in Bi2Sr2CaCu2O x was the weak link, and is suggested that there existed a less detrimental grain orientation.Keywords
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