We stabilized SrRu0.9Fe0.1O3 single-crystalline films on SrTiO3 (001) and SrTiO3 (110) substrates using epitaxial strain during thin-film growth. X-ray diffraction (XRD) theta-2 theta scans showed strong peaks demonstrating single-crystal quality. Fe doping in SrRuO3 had negative effects on the ferromagnetic properties, such as decreasing the T-c and saturated magnetic moment, as well as weakening the ferromagnetism. The negative effects were reduced when a suitable surface of the cubic substrate was selected for thin-film SrRuO3 growth. We found that the ferromagnetic properties, such as the T-c and saturated magnetic moment, differed depending on the substrate surface. The observed differences are discussed in terms of Ru-Ru nearest-neighbor distance. (C) 2014 Elsevier B.V. All rights reserved.