Abstract
Physical properties of SrRu1-xMnxO3 (0 ≤ x ≤ 0.5) show complex changes at about x=0.2∼0.3. The crystal structure changes from the orthorhombic of SrRuO3 to the tetragonal of SrRu0.5Mn0.5O3. The electrical conductivity shows a metallic behavior at x=0.0∼0.15, a band-gap type semiconductive behavior at x=0.4, and a hopping type semiconductive behavior at x=0.5. The samples between x=0.2 and 0.3 are mixtures of the two phases, and the conduction shows semiconductive behavior in low temperature and metallic behavior in high-temperature. Itinerant ferromagnetism disappears at about x=0.3. This system's MI transition occurs when the structure changes from orthorhombic to tetragonal by Mn doping into the Ru site.
