SUPERCONDUCTIVITY IN SRCUO2-BACUO2 SUPERLATTICES - FORMATION OF ARTIFICIALLY LAYERED SUPERCONDUCTING MATERIALS

Pulsed-laser deposition was used to synthesize artificially layered hi gh-temperature superconductors. Thin-film compounds were formed when t he constraint of epitaxy was used to stabilize SrCuO2-BaCuO2 superlatt ices in the infinite layer structure. Using this approach, two new str uctural families, Ba2Srn-1Cun+1O2n+2+delta and Ba4Srn-1Cun+3O2n+6+delt a, have been synthesized; these families superconduct at temperatures as high as 70 kelvin.