2007/12/11 by S. Shibasaki, Soichiro Shibasaki, Y. Takahashi +6 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Strongly Correlated Electrons (cond-mat.str-el) #Thermal Expansion and Ionic Conductivity #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.0712.1626
8 pages, 5 figures, J. Phys. Condens. Matter (in press)
openalex publication_date 2007/12/11 · arxiv created 2009/02/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report measurements and analyses of resistivity, thermopower, and thermal conductivity of polycrystalline samples of perovskite LaRh1-xNixO3. The thermopower is found to be large at 800 K (185 μV/K for x=0.3), which is ascribed to the high-temperature stability of the low-spin state of Rh3+/Rh4+ ions. This clearly contrasts with the thermopower of the isostructural oxide LaCoO3, 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.