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Correlation between critical current and resistivity in YBa2Cu3O7

✍ Scribed by M. Dhalle; W. Boon; E. Osquiguil; C. Van Haesendonck; Y. Bruynseraede; J. Kwarciak; O. Van Der Biest

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 193 KB
Volume: 185-189
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(91)91348-8

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✦ Synopsis

Critical current versus temperature measurements were carried out in ceramic YBazCuaOr samples. The samples were all prepared using the same sintering procedure, but starting from powders obtained by different wet and dry methods. All samples showed a linear J~ vs. T behaviour, typical of Josephson weak-link coupling, with a slope that depends on the preparation method. Using the Ambegaokar-Baratoff relation for J~, the difference in slopes can be attributed to a change in the characteristic value of the junction resistance. This value turns out to be clearly correlated with the resistivity in the normal state.

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