Ultrathin films of SrRu O3 (SRO) have been grown on SrTi O3 (001) substrates to study thickness-dependent physical properties. We have revealed the existence of two critical film thicknesses where a metal-insulator transition occurs at a film thickness of 4-6 ML (monolayer) and the value of Curie temperature saturates at about 15 ML. The electrical and magnetic properties are well correlated with the thickness-dependent evolution of surface morphology of the ultrathin SRO films. These experimental results suggest the importance of the disorder associated with the unique growth mode transition in SRO films.
ASJC Scopus subject areas
- Physics and Astronomy(all)