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Ferromagnetism and Ru-Ru distance in SrRuO3 thin film grown on SrTiO3 (111) substrate

  • Lee, Bowha (Department of Physics, Hankuk University of Foreign Studies, Yongin 449-791, South Korea) , Kwon, O-Ung (Department of Physics, Hankuk University of Foreign Studies, Yongin 449-791, South Korea) , Shin, Ran Hee (Department of Physics, Hankuk University of Foreign Studies, Yongin 449-791, South Korea, Department of Physics, Ewha Womans University, Seoul 120-750, South Korea) , Jo, William (조윌렴, Department of Physics, Ewha Womans University, Seoul 120-750, South Korea) , Jung, Chang Uk (Department of Physics, Hankuk University of Foreign Studies, Yongin 449-791, South Korea)
  • NANOSCALE RESEARCH LETTERS[1556-276X], 2014, v.9, 8

초록/요약

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.

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