| Numéro |
J. Phys. IV France
Volume 123, March 2005
|
|
|---|---|---|
| Page(s) | 405 - 407 | |
| DOI | https://doi.org/10.1051/jp4:2005123074 | |
J. Phys. IV France 123 (2005) 405-407
DOI: 10.1051/jp4:2005123074
Origin of the noise in the high-T
superconducting YBa2Cu3O
thin films
A. Labrag1, A.Taoufik1, S. Senoussi2 and A. Ramzi1 1 Laboratoire des Matériaux Supraconducteurs à Haute Température Critique, Département de Physique, Faculté des Sciences, Université Ibn Zohr, BP. 8106, Agadir, Maroc
2 Laboratoire de Physique des Solides (associé au CNRS URA 0002), Université Paris Sud, Bâtiment 510, 91405 Orsay Cedex, France
Abstract
In the mixed state of high-T
superconductors, the
magnetic flux can penetrate the superconducting state in the form of
vortices. Moving vortices create resistance, so they must be pinned to
permit dissipationless current flow. This is particularly important issue
for high-transition-temperature superconductors, in which the vortices move
very easily.
We studied the behavior of the characteristic noise of high-T
superconductors near the transition conductor-superconductor region in
YBa2Cu3O
thin films as a function of the temperature
and of the applied magnetic field. Our results show that when the temperature increases near the superconducting transition region, the amplitude of the voltage noise
increases. And this amplitude depends strongly on the electrical current
crossing the sample.
© EDP Sciences 2005