Electrical transport studies of epitaxial Sr2RuO4 films

The electrical transport properties of epitaxial films of Sr2RuO4 grown by pulsed laser deposition (PLD) have been studied. Sr2RuO4 is theonly known layered superconducting perovskite which is free of copper. In single crystal form, Sr2RuO4 becomes superconducting at T=0.93K. Although good metallic conductivity has been found for these epitaxial films, no superconductivity has been detected so far. Results on temperature dependent in- and out-of-plane resistivities of these films are presented and their implications are discussed.