Effect of Electronic Structure on Seebeck Coefficient of Oxide Thermoelectric Semiconductor and Role of the Oxide

Sugihara, S.; Katayose, Manabu; Nakamura, Takeshi; Isobe, Takamasa

doi:10.2497/jjspm.50.464

Cited by 2 publications

References 2 publications

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First-principles simulation of electric and magnetic properties of Sr2FeMoO6 and analysis of its thermoelectric properties

Yutoh

Yamamoto

Sugihara

et al. 2005

Electron. Comm. Jpn. Pt. II

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SUMMARYUsing a first-principles approach, we investigate the electronic and magnetic properties of the double-perovskite half-metal Sr 2 FeMoO 6 . We discuss our experimental studies of the thermoelectric properties of this compound, and our computer-simulation data, which indicate that its magnetic structure is a strong function of the location of the oxygen sites within the crystal lattice. We find experimentally that the Seebeck coefficient is about 10 to 15 µV/K, while the electrical resistivity is of order 10 -4Ω⋅m. We also argue that by skillfully controlling these parameters experimentally, it may be possible to realize a latent high thermoelectric conversion efficiency in this material, although verification of this requires further analysis and experimental study of properties such as the amount of magnetic disorder. In conclusion, we argue that while there has been almost no applications research done on this class of halfmetals, our simulation and experimental work indicate that high thermoelectric performance could be theoretically possible, which provides an indicator of what direction research on future applications of this material should follow.

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First-principles simulation of electric and magnetic properties of Sr2FeMoO6 and analysis of its thermoelectric properties

Yutoh

Yamamoto

Sugihara

et al. 2005

Electron. Comm. Jpn. Pt. II

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Effects of oxide additive on thermoelectricity of FeSi2

Sugihara

Morikawa

Igarashi

et al. 2006

2006 25th International Conference on Thermoelectrics

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Thermoelectricity has been hot issue in these days, because of environmental problems and energy sources deficit. Moreover, material development for thermoelectricity is now busy in oxide and metal or alloy, basically. However, conclusive materials with good performance have not yet been found in application basis. We have studied oxide-added 1B -FeSi2 for these years. Iron disilicide is well known and utilized in relatively higher temperature. In this report, we indicated our successful improvement of performance of -FeSi2 added with Ta2O5 showing the figure of merit almost 0.3 X 10-3/K This was obtained by reducing thermal conductivity and electrical resistivity (a half of standard FeSi2 ).

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Effect of Electronic Structure on Seebeck Coefficient of Oxide Thermoelectric Semiconductor and Role of the Oxide

Cited by 2 publications

References 2 publications

First-principles simulation of electric and magnetic properties of Sr2FeMoO6 and analysis of its thermoelectric properties

First-principles simulation of electric and magnetic properties of Sr2FeMoO6 and analysis of its thermoelectric properties

Effects of oxide additive on thermoelectricity of FeSi2

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