Superconductor-ferroelectric heterostructures

Superconductor-ferroelectric heterostructures were prepared by deposition o f ferroelectric doped-PZT type material on the top of the superconductor YB CO thin films. Both, ferroelectric and superconductor thin films were obtai ned by off-axis RF magnetron sputtering method with a single target. On the se heterostructures, measurements were made in order to evidence the influe nce of contact between the two materials on the electrical and thermal para meters. X-ray diffraction patterns of superconductor thin film show a good crystallization c-axis oriented perpendicular to the substrate plane, and a perovskite structure without traces of pyrochlore at 550 degrees C the fer roelectric thin film deposited by RF magnetron sputtering (off axis method) . Important variations of the critical temperature of superconductor films have been obtained, due to the increased dielectric permittivity (epsilon).