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  Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices

Komar, P., Chavez-Angel, E., Euler, C., Balke, B., Kolb, U., Mueller, M. M., et al. (2016). Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices. APL Materials, 4(10): 104902, pp. 1-7. doi:10.1063/1.4954499.

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Komar, Paulina1, Author
Chavez-Angel, Emigdio1, Author
Euler, Christoph1, Author
Balke, Benjamin1, Author
Kolb, Ute1, Author
Mueller, Mathis M.1, Author
Kleebe, Hans-Joachim1, Author
Fecher, Gerhard H.2, Author              
Jakob, Gerhard1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              

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 Abstract: Thermoelectric modules based on half-Heusler compounds offer a cheap and clean way to create eco-friendly electrical energy from waste heat. Here we study the impact of the period composition on the electrical and thermal properties in non-symmetric superlattices, where the ratio of components varies according to (TiNiSn)(n:)(HfNiSn)(6-n), and 0 <= n <= 6 unit cells. The thermal conductivity (kappa) showed a strong dependence on the material content achieving a minimum value for n = 3, whereas the highest value of the figure of merit ZT was achieved for n = 4. The measured kappa can be well modeled using non-symmetric strain relaxation applied to the model of the series of thermal resistances. (C) 2016 Author(s).

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Language(s): eng - English
 Dates: 2016-06-212016-06-21
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: ISI: 000387576100025
DOI: 10.1063/1.4954499
 Degree: -

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Title: APL Materials
Source Genre: Journal
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Publ. Info: AIP Scitation
Pages: - Volume / Issue: 4 (10) Sequence Number: 104902 Start / End Page: 1 - 7 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/2166-532X