Inductive characterization of superconducting nano-engineered artificial cuprates

Ultrathin artificial high temperature superconducting structures were grown by pulsed laser deposition stacking in sequence epitaxial layers of (Ba(0.9)Nd(0.1))CuO(2+x) and CaCuO(2). Critical temperature T(c) and critical current density J(c) for such nano-engineered structures consisting of a single (CaCuO(2)) block sandwiched between two (Ba(0.9)Nd(0.1))CuO(2+x) charge reservoir blocks were measured inductively. The onset of superconducting transition is higher than 50 K. The purely intralayer critical current density was measured at 4.2 K and resulted to be larger than 10(8) A/cm(2).