Magnetic and Electrical Transport Properties of Sr_1-xLa_xRuO₃ (0≤x≤0.10)

We investigate the lightly doped polycrystalline Sr_1-xLa_xRuO₃ (x =0, 0.02, 0.08 and 0.10). With La doping, the ferromagnetism in the system has been suppressed. The transition temperature is T_c’ at which the long-range ferromagnetism establishes and the magnetization under 3T at 5K decreases with increasing x. In contrast to Sr_1-xCa_xRuO₃, the samples remain with the PM-FM transition at 162K, which might be attributed to the valency change of Ru.