Sr2RuO4 is the only known layered perovskite that is free of copper, yet superconducting. Its low metallic resistivity and excellent lattice match with YBa2Cu3O7-δ make it an attractive candidate for use as conductive electrodes to YBa2Cu3O7-δ-based superconducting devices or as a normal metal in YBa2Cu3O7-δ-based SNS junctions. We have determined optimal deposition conditions for growth of single-domain epitaxial films of Sr2RuO4. Films with excellent crystallinity are readily grown at substrate temperatures exceeding 1000 °C at low pressures. At lower temperatures and higher pressures, films predominantly consist of the SrRuO3 phase. Resistivity versus temperature measurements reveal that the as-grown Sr2RuO4 films are metallic, but not superconducting. Epitaxial YBa2Cu3O7-δ/Sr2RuO4 heterostructures have also been grown. X-ray and resistivity measurements show that the YBa2Cu3O7-δ films are of high quality.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering