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We investigated the nature of transport and magnetic properties inSrIr0.5Ru0.5O3, (SIRO) which has characteristics intermediate between acorrelated non-Fermi liquid state and an itinerant Fermi liquid state, bygrowing perovskite thin films on various substrates (SrTiO3 (001),(LaAlO3)0.3(Sr2TaAlO6)0.7 (001) and LaAlO3 (001)). We observed systematicvariation of underlying substrate dependent metal-to-insulator transitiontemperatures at 80 K on SrTiO3, 90 K on (LaAlO3)0.3(Sr2TaAlO6)0.7 and 100 K onLaAlO3) in resistivity. Resistivity in the metallic region follows a T3/2 powerlaw; whereas insulating nature at low T is due to the localization effect.Magnetoresistance (MR) measurement of SIRO on SrTiO3 (001) shows negative MRupto 25 K and positive MR above 25 K, with negative MR proportional to B1/2 andpositive MR proportional to B2; consistent with the localized-to-normaltransport crossover dynamics. Furthermore, observed spin glass like behavior ofSIRO on SrTiO3 (001) in the localized regime, validates the hypothesis that(Anderson) localization favors glassy ordering. These remarkable featuresprovide a promising approach for future applications and of fundamentalinterest in oxide thin films.

Metal insulator transition and magnetotransport anomalies in perovskite SrIr0.5Ru0.5O3 thin films