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

Abstract

We investigated the nature of transport and magnetic properties in SrIr0.5Ru0.5O3, (SIRO) which has characteristics intermediate between a correlated non-Fermi liquid state and an itinerant Fermi liquid state, by growing perovskite thin films on various substrates (SrTiO3 (001), (LaAlO3)0.3(Sr2TaAlO6)0.7 (001) and LaAlO3 (001)). We observed systematic variation of underlying substrate dependent metal-to-insulator transition temperatures at 80 K on SrTiO3, 90 K on (LaAlO3)0.3(Sr2TaAlO6)0.7 and 100 K on LaAlO3) in resistivity. Resistivity in the metallic region follows a T3/2 power law; whereas insulating nature at low T is due to the localization effect. Magnetoresistance (MR) measurement of SIRO on SrTiO3 (001) shows negative MR upto 25 K and positive MR above 25 K, with negative MR proportional to B1/2 and positive MR proportional to B2; consistent with the localized-to-normal transport crossover dynamics. Furthermore, observed spin glass like behavior of SIRO on SrTiO3 (001) in the localized regime, validates the hypothesis that (Anderson) localization favors glassy ordering. These remarkable features provide a promising approach for future applications and of fundamental interest in oxide thin films.

5 figures, published in Journal of Applied Physics

References in corpus (5)

• Bandwidth-Controlled Insulator-Metal Transition and Correlated Metallic State in 5$d$ Transition Metal Oxides Sr${}_{n+1}$Ir${}_n$O${}_{3n+1}$ ($n$=1, 2, and $\infty$)
• Compressive strain-induced metal-insulator transition in orthorhombic SrIrO3 thin films
• Observation of Spin-glass-like Behavior in SrRuO3 Epitaxial Thin Films
• Possible magnetic-polaron-switched positive and negative magnetoresistance in the GdSi single crystal
• Effects of substrate temperature on the unusual non-Fermi liquid metal to insulator transition in perovskite SrIrO3 thin films

Cited by in corpus (5)

• Growth and engineering of perovskite SrIrO3 thin films
• Observation of non-Fermi liquid behavior in hole doped Eu2Ir2O7
• Anisotropy and interaction effects of strongly strained SrIrO3 thin films
• Electronic and magnetic transitions in perovskite SrRu1-xIrxO3 thin films
• Site dilution and charge disorder effect on physical properties in SrRu${}_{1-x}$Ga${}_x$O${}_3$