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Journal of Applied Physics / Volume 92 / Issue 2 / ELECTRONIC STRUCTURE AND TRANSPORT (PACS 71-73)

J. Appl. Phys. 92, 979 (2002); http://dx.doi.org/10.1063/1.1486030 (8 pages)

Composition dependence of thermoelectric properties of AlPdRe icosahedral quasicrystals

K. Kirihara1,2 and K. Kimura2,3

1Intelligent Modeling Laboratory, University of Tokyo, 113-8656 Tokyo, Japan
2Department of Advanced Materials Science, University of Tokyo, 113-0033 Tokyo, Japan
3Department of Materials Science, University of Tokyo, 113-8656 Tokyo, Japan

(Received 4 December 2001; accepted 23 April 2002)

We present the composition dependence of the Seebeck coefficient and the electrical conductivity of AlPdRe icosahedral alloys. As the concentration of transition metal (either Pd or Re) increases, the Seebeck coefficient rapidly increases. The strong composition dependence is related to the pseudogap structure in the electron density of states at the Fermi energy, and to the variation in bonding nature between Al and transition metal. Glass-like transport behavior in thermal conduction is also observed. The dimensionless thermoelectric figure of merit has a maximum value of approximately 0.1 in the temperature range from 600 to 700 K and reveals strong composition dependence. © 2002 American Institute of Physics.

© 2002 American Institute of Physics

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KEYWORDS and PACS

Keywords

aluminium alloys, palladium alloys, rhenium alloys, quasicrystals, Seebeck effect, electrical conductivity, electronic density of states, Fermi level

PACS

  • 72.15.Jf

    Thermoelectric and thermomagnetic effects

  • 72.15.Eb

    Electrical and thermal conduction in crystalline metals and alloys

  • 71.20.Be

    Transition metals and alloys

  • 61.44.Br

    Quasicrystals

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1486030

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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