Magnetic Field Dependence Of The Critical Currents In Bi2sr2cacu2o8/Bi2sr2cuo6 Multilayers: An Approach To An Ideal Two Dimensional Superconductor

Angular magnetic field dependence of the critical currents of (Bi2Sr2CaCu2O8)(m)/(Bi2Sr2CuO6)(n) multilayers has been investigated, m and n being the numbers of c-axis half unit cells of each phase in one layer. In the limiting case of 15 Angstrom thick 2212 layers and 24 Angstrom thick 2201 layers per multilayer unit (rn = 1,n = 2), we have achieved a superconducting system where J(c)(H) is independent of a magnetic field (H less than or equal to 20 T) parallel to the layers. We demonstrate that this system behaves like an ideal 2D superconductor.