ANISOTROPY AND DIMENSIONALITY IN THE RESISTIVE MEASUREMENTS IN EPITAXIAL-FILMS OF BISRCACUO

The anisotropies of BiSrCaCuO 2212 films have been investigated by measuring the angular and the temperature dependence of the magnetic field H* for the onset of the d.c. resistivity. The experimental results put into evidence a crossover between a two-dimensional (2D) and an anisotropic three-dimensional (3D) behaviour, by varying the temperature