Electrical transport effects due to oxygen content modifications in a Bi2Sr2CaCu2O8+δ superconducting whisker

We report a set of resistivity measurements along the a-axis of a Bi2Sr2CaCu2O8+delta microscopic superconducting whisker. The effect of the storage environment on sample ageing has been studied, considering both an air atmosphere at 273 K and a helium atmosphere at about 300 K for an overall storag...

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Bibliographic Details
Published in:Superconductor science & technology 2007-07, Vol.20 (7), p.667-671
Main Authors: Cagliero, Stefano, Agostino, Angelo, Bonometti, Elisabetta, Truccato, Marco
Format: Article
Language:English
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Summary:We report a set of resistivity measurements along the a-axis of a Bi2Sr2CaCu2O8+delta microscopic superconducting whisker. The effect of the storage environment on sample ageing has been studied, considering both an air atmosphere at 273 K and a helium atmosphere at about 300 K for an overall storage time of about 100 days. It is clearly shown that the material underwent a remarkable resistivity increase of 26% at 260 K accompanied by a decrease in the critical temperature of 0.6 K during the whole ageing period. The helium atmosphere increased the average process rate by about two orders of magnitude. The present results are in agreement with previous findings on room temperature structural modifications in Bi2Sr2CaCu2O8+delta whiskers and can be ascribed to oxygen depletion phenomena from the material.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/20/7/013