J. Phys. IV France
Volume 123, March 2005
Page(s) 409 - 412

J. Phys. IV France 123 (2005) 409-412

DOI: 10.1051/jp4:2005123075

Anisotropy of the critical current density in YBa2Cu3O $_{7\hbox{-}\delta}$ single crystal

A. Ramzi1, A. Taoufik1, S. Senoussi2 and A. Labrag1

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

We have investigated the anisotropy of the critical current density in high temperature superconductors YBa2Cu3O $_{7\hbox{-}\delta}$ single crystal. Vibrating sample magnetometer (V.S.M.) method was used for these measurements. The applied magnetic field dependence of critical current density for two directions, parallel and perpendicular to the crystallographic c-axis, at various temperatures, are derived from the measured magnetization hysteresis cycles curves using the Bean model. The critical current density for these two orientations are very different, the pinning mechanism can explain this anisotropy.

© EDP Sciences 2005