title: Thermoelectric properties of LaRh(1-x)Ni(x)O(3).
abstract: We report measurements and analyses of resistivity, thermopower and thermal conductivity of polycrystalline samples of perovskite LaRh(1-x)Ni(x)O(3). The thermopower is found to be large at 800 K (185 µV K(-1) for x = 0.3), which is ascribed to the high-temperature stability of the low-spin state of Rh(3+)/Rh(4+) ions. This clearly contrasts with the thermopower of the isostructural oxide LaCoO(3), which rapidly decreases above 500 K owing to the spin-state transition. The spin state of the transition-metal ions is one of the most important parameters in oxide thermoelectrics.
authors.affiliation: Department of Applied Physics, Waseda University, Tokyo 169-8555, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Shibasaki
authors.forename: Y
authors.initials: Y
authors.lastname: Takahashi
authors.forename: I
authors.initials: I
authors.lastname: Terasaki