Crystal Structure and Thermoelectric Properties of Chimney-Ladder Higher Manganese Silicides
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- Miyazaki Yuzuru
- Department of Applied Physics, Graduated School of Engineering, Tohoku University
Bibliographic Information
- Other Title
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- チムニーラダー型マンガンケイ化物の結晶構造と熱電特性
- チムニーラダーカタ マンガンケイカブツ ノ ケッショウ コウゾウ ト ネツデントクセイ
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Abstract
Crystal structure, electronic structure and thermoelectric (TE) properties of Nowotny chimney-ladder (NCL) higher manganese silicides (HMSs) are reviewed. According to a (3+1)-dimensional superspace approach, HMSs are revealed to belong to incommensurate composite crystals, wherein [Mn] and [Si] subsystems possess an irrational c-axis ratio γ=cMn/cSi. The γ parameter, also represents a stoichiometry of the HMSs as MnSiγ, dictates the electronic structure, directly relating to a valence electron counting number, VEC. The p-type TE performance can be enhanced by a partial substitution of V, Cr, etc., while n-type HMSs can be obtained by heavily substituting Mn with Fe, etc., to realize VEC>14. A unique thermal expansion has been discovered at T~800 K, which would deteriorate TE performance and hence to be avoided from a practical application point of view.<br>
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 79 (11), 530-537, 2015
The Japan Institute of Metals and Materials
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Keywords
Details 詳細情報について
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- CRID
- 1390001206481947648
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- NII Article ID
- 130005105619
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 026843204
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed