(Ba,La)CuO2/CaCuO2 superconducting multilayers: stabilizing effect of La

Superconducting multilayers, whose growth and structure are determined by the kinetic deposition instead of by thermodynamics, are a powerful tool for investigating high T-c superconductor properties. By means of pulsed laser deposition, we grew ((Ba, La)CuO2-delta)(2)/(CaCuO2)(n) superconducting superlattices, Different electrical properties have been observed by increasing La doping in the block layer: in particular. 15%-La substituted samples Showed a good metallic behavior in the normal state, underwent a superconducting transition at 70 K and presented a low anisotropy, similar to that of YBCO.