New thermoelectric oxide and electronic structures

We investigated ferromagnetic oxide of Sr₂FeMoO₆ as thermoelectric material from the view point of electronic structures using computer simulation and experimental method. Sr₂FeMoO₆ is well known a double perovskite with a half metallic structure. Our experimental results showed that the Seebeck coefficient was 15 μ V/K and electrical resistivity was 2 × 10^-4 Ω m at 700K. Furthermore, we proposed the estimation of Seebeck coefficient from electronic structures using ab initio calculation and experimental value of electric resistivity, and thermodynamics such as heat capacity and entropy relating to spin were also taken into consideration.