Ferromagnetism and Ru-Ru distance in SrRuO3 thin film grown on SrTiO3 (111) substrate
1 Department of Physics, Hankuk University of Foreign Studies, Yongin 449-791, South Korea
2 Department of Physics, Ewha Womans University, Seoul 120-750, South Korea
Nanoscale Research Letters 2014, 9:8 doi:10.1186/1556-276X-9-8Published: 7 January 2014
Epitaxial SrRuO3 thin films were grown on both (100) and (111) SrTiO3 substrates with atomically flat surfaces that are required to grow high-quality films of materials under debate. The following notable differences were observed in the (111)-oriented SrRuO3 films: (1) slightly different growth mode, (2) approximately 10 K higher ferromagnetic transition temperature, and (3) better conducting behavior with higher relative resistivity ratio, than (100)c-oriented SrRuO3 films. Together with the reported results on SrRuO3 thin films grown on (110) SrTiO3 substrate, the different physical properties were discussed newly in terms of the Ru-Ru nearest neighbor distance instead of the famous tolerance factor.
75.70.Ak; 75.60.Ej; 81.15.Fg