書誌事項
- タイトル別名
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- Off-stoichiometric Effects on Thermoelectric Properties of Fe2VAl-based Compounds
- Fe2VAlケイ ホイスラー カゴウブツ ノ ネツデン トクセイ ニ オヨボス ヒ カガクリョウロン ソセイ ノ コウカ
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説明
We report on the thermoelectric properties of Fe2-x(V1+x-yTiy)Al alloys (−0.04≤x≤0.02, 0≤y≤0.10). While a small deviation from the stoichiometric Fe2VAl composition causes an enhancement in the Seebeck coefficient, a slight substitution of Ti for V leads to a further increase in the Seebeck coefficient and a decrease in the electrical resistivity. The Seebeck coefficient reaches 110 μV/K at 300 K for x=−0.04 and y=0.03, which is the largest in the p-type Fe2VAl-based alloys so far reported. The electronic structures of Fe2-xV1+xAl alloys with x=−0.04, 0 and 0.02 have been investigated by soft X-ray photoelectron spectroscopy. The valence-band spectra near the EF of Fe-rich alloy (x=−0.04) is drastically changed from that of the stoichiometric Fe2VAl. Therefore substantial enhancements in the Seebeck coefficient for the off-stoichiometric alloys could be due to a modification in the band structure on the valence band side around the Fermi level EF.
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 57 (4), 207-212, 2010
一般社団法人 粉体粉末冶金協会
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詳細情報 詳細情報について
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- CRID
- 1390001206307385472
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- NII論文ID
- 10026346479
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- NII書誌ID
- AN00222724
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- COI
- 1:CAS:528:DC%2BC3cXlsl2gs7w%3D
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- ISSN
- 18809014
- 05328799
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- NDL書誌ID
- 10673893
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可