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Ruddlesden-Popper phases as thermoelectric oxides : Nb-doped SrO (SrTiO3)n (n=1,2)
http://hdl.handle.net/2237/8771
http://hdl.handle.net/2237/8771eb68d6c1-91bf-4919-8da1-94dabeb0159b
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
JourAppPhys_100-63717.pdf (398.8 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2007-09-21 | |||||
| タイトル | ||||||
| タイトル | Ruddlesden-Popper phases as thermoelectric oxides : Nb-doped SrO (SrTiO3)n (n=1,2) | |||||
| 言語 | en | |||||
| 著者 |
Lee, Kyu Hyoung
× Lee, Kyu Hyoung× Kim, Sung Wng× Ohta, Hiromichi× Koumoto, Kunihito |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | Copyright (2006) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A class of materials known as superlattices has shown substantial promise for potential thermoelectric (TE) applications because of its low thermal conductivity. We have investigated natural superlattice Ruddlesden-Popper (RP) phases [S. N. Ruddlesden and P. Popper, Acta Crystallogr. 10, 538 (1957)] to elucidate their potential as TE materials. The TE properties of Nb-doped SrO(SrTiO3)n (n=1,2) with a RP structure were measured, and the origin of the TE properties is discussed from the viewpoint of the structure of the TiO6 octahedron. Compared with the cubic perovskite-type Nb-doped SrTiO3, the lattice thermal conductivity decreased by more than 50% (4.4–5 W m−1 K−1) at room temperature and by 30% (1.9–2.2 W m−1 K−1) at 1000 K. There was a decrease in electrical conductivity owing to the randomly distributed insulating SrO layers in polycrystalline RP phases, and it was found that large TE power can be obtained in conjunction with high symmetry TiO6 octahedra. The largest dimensionless figure of merit (ZT), 0.14 at 1000 K, was obtained in 5 at. % Nb-doped SrO(SrTiO3)2. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | American Institute of Physics | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1063/1.2349559 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0021-8979 | |||||
| 書誌情報 |
en : JOURNAL OF APPLIED PHYSICS 巻 100, 号 6, p. 063717-063717, 発行日 2006-09-15 |
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| フォーマット | ||||||
| 値 | application/pdf | |||||
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| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/8771 | |||||
| 識別子タイプ | HDL | |||||
