Electrical conductivity of SrTi1-xRuxO3

SiTi(1-x)RuxO3 perovskite oxide compound exhibits different physical proper ties depending on the x value and the temperature range. High electrical co nductivity, ferromagnetism phenomena, piezoelectricity, and superconductivi ty are currently properties found in this perovskite family. In this paper we present a study of electronic conduction of this mixed perovskite in fun ction of x and temperature by alternating conductivity technique. Pure SrTi O3 is an insulating material that progresses to a conductive one as x incre ases. The model used to explain this conductivity evolution is the random f ree energy barrier model developed to explain transport phenomena in disord ered materials. Disorder in this perovskite is supported by diffraction stu dies that evidenced slight delocalizations of oxygen atoms in the lattice, added due to random substitutions of Ti4+ by Ru4+.