Resisitivity, thermopower, and susceptibility of RNiO3 (R=La,Pr).

We report the resistivity, thermopower, and dc susceptibility of RNiO 3 (R=La,Pr) ceramic samples for 1.4 K≤T≤300 K. The resistivity of LaNiO 3 shows a T 2 dependence below 80 K and changes over to a T 1.5 dependence at higher temperature (100-300 K). The resistivity of PrNiO 3 exhibits a metal-insulator transition at T MI =130 K with a linear temperature dependence above T MI . The thermopower of both LaNiO 3 and PrNiO 3 is linear and negative in the metallic region