Thermoelectric Properties of the Off-Stoichiometric Heusler Alloys Fe_2−<i>y</i>V_{1+<i>x</i>+<i>y</i>}Al_1−<i>x</i>

• Inukai Manabu

  Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology

• Miyazaki Hidetoshi

  Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology

• Ide Naoki

  Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology

• Nishino Yoichi

  Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology

Bibliographic Information

Other Title

• 非化学量論組成ホイスラー合金Fe_2−<i>y</i>V_{1+<i>x</i>+<i>y</i>}Al_1−<i>x</i>の熱電特性
• 非化学量論組成ホイスラー合金Fe₂₋yV₁₊x₊yAl₁₋xの熱電特性
• ヒカガクリョウロン ソセイ ホイスラー ゴウキン Fe ₂ ₋ yV ₁ ₊ x ₊ yAl ₁ ₋ x ノ ネツデントクセイ
• Thermoelectric Properties of the Off-Stoichiometric Heusler Alloys Fe_{2&minus;<i>y</i>}V_{1+<i>x</i>+<i>y</i>}Al_{1&minus;<i>x</i>}

Abstract

  We report the thermoelectric properties of the off-stoichiometric Fe_2−yV_1+x+yAl_1−x alloys in the temperature range from 300 to 750 K. Fe_2−yV_1+x+yAl_1−x alloys with V-rich (1+x+y>1−x, i.e., y>−2x) and Al-rich (y<−2x) composition show the negative and positive sign of Seebeck coefficient, respectively, and the peak temperature of Seebeck coefficient shifts to the higher temperature side with increasing V and Al composition. Electrical resistivity of Fe_2−yV_1+x+yAl_1−x alloys shows the metallic temperature dependence. Due to the combination of the Fe/V and V/Al off-stoichiometric effects, Fe_1.97V_1.12Al_0.91 and Fe_2.03V_0.89Al_1.08 alloys show the highest power factors of 4.03×10⁻³ W/m K² for n-type and 2.52×10⁻³ W/m K² for p-type at 500 K, respectively.<br>

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 79 (11), 621-626, 2015

  The Japan Institute of Metals and Materials

Keywords

• thermoelectric materials
• Heusler alloys
• off-stoichiometry
• Seebeck coefficient

Details

• CRID: 1390001206481952512
• NII Article ID: 130005105624
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet.ja201519
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 026843407
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026843407
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/79/11/79_JA201519/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed