Issue |
Europhys. Lett.
Volume 66, Number 2, April 2004
|
|
---|---|---|
Page(s) | 272 - 276 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2003-10208-x | |
Published online | 01 April 2004 |
Anomalous pinning enhancement during the
superconducting-normal transition of
-
Structure Research Laboratory, University of Science and Technology of China and National High Magnetic Field Laboratory - Hefei, 230026, Anhui, PRC
Corresponding author: song@pi1.physik.uni-stuttgart.de
Received:
3
June
2003
Accepted:
18
February
2004
The magnetic-field dependence of the resistance (R-H) of
-
was carefully measured.
Accompanied by the superconducting-normal (S-N) transition,
a small resistance dip emerges near the upper critical field
. This anomaly was consolidated by that of
the critical current, which presents a shoulder in the
-H curve at the corresponding field. We
tentatively proposed a model involving the repinning of the
moving vortices. From this scenario, theoretical deduction
leads to consistent results in this region.
PACS: 74.25.Qt – Vortex lattices, flux pinning, flux creep / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
© EDP Sciences, 2004
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