ANISOTROPY AND DIMENSIONALITY OF BI2SR2CACU2O8+X FROM TRANSPORT MEASUREMENTS

We analyze measurements of the anisotropy in several Bi(2)Sr2CaCu(2)OB (8+x) films of different magnetotransport properties: critical-current density, microwave dissipation, and resistively determined irreversib ility line. It is shown that all those measurements present the same a ngular scaling property, irrespective of the different measured quanti ties. The anisotropy depends on the temperature, accordingly to the qu asi-two-dimensional (2D), decoupled-layer picture. In the same picture , a single parameter epsilon(T) (anisotropy ratio) is sufficient to de scribe the evolution of the angular scaling functions. All the data fo r all the samples follow the same identical curve of epsilon versus th e reduced temperature. Departures from the quasi-2D model are observed very close to T-c.