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Journal of Applied Physics / Volume 94 / Issue 10 / ELECTRONIC STRUCTURE AND TRANSPORT (PACS 71-73)

J. Appl. Phys. 94, 6560 (2003); http://dx.doi.org/10.1063/1.1611636 (6 pages)

Effect of Ru substitution for Re on the thermoelectric properties of AlPdRe icosahedral quasicrystals

T. Nagata1, K. Kirihara2, and K. Kimura3,1

1Department of Materials Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
2National Institute of Advanced Industrial Science and Technology, 1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
3Department of Advanced Materials Science, University of Tokyo, 502 Kiban-toh, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8561

(Received 5 May 2003; accepted 29 July 2003)

The thermoelectric properties of the quaternary AlPdReRu icosahedral quasicrystals (i-AlPdReRu) obtained by replacing Re with Ru in AlPdRe icosahedral quasicrystals have been studied. In the middle of the substitution of Ru for Re, the electrical conductivity increases and the peak of Seebeck coefficient shifts to a higher temperature side. By Ru substitution for the AlPdRe quasicrystal, the dimensionless figure of merit (ZT) increases 1.5 times from 0.1 to 0.15. According to the result of two-band analysis, the effective mass has peaks at both the compositions of i-AlPdRe and i-AlPdReRu which reveal the peak ZT values. We ascribe the behavior of effective mass to the change in the bond strength of intra- and inter-Mackay icosahedral clusters. © 2003 American Institute of Physics.

© 2003 American Institute of Physics

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KEYWORDS and PACS

Keywords

quasicrystals, electrical conductivity, Seebeck effect, rhenium alloys, effective mass, bonds (chemical), ruthenium alloys, aluminium alloys, palladium alloys

PACS

  • 72.15.Jf

    Thermoelectric and thermomagnetic effects

  • 61.44.Br

    Quasicrystals

  • 71.23.Ft

    Quasicrystals

  • 71.18.+y

    Fermi surface: calculations and measurements; effective mass, g factor

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1611636

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.
    K. Kirihara, T. Nagata, K. Kimura, K. Kato, E. Nishibori, M. Takata, and M. Sakata, Phys. Rev. B 68, 014205 (2003).

    K. Kirihara and K. Kimura, Phys. Rev. B 64, 212201 (2001).

    A. L. Pope, T. M. Tritt, M. A. Chernikov, and M. Feuerbacher, Appl. Phys. Lett. 75, 1854 (1999)APPLAB000075000013001854000001.

    A. L. Pope, R. Schneidmiller, J. W. Kolis, and T. M. Tritt, Phys. Rev. B63, 052202 (2001).

    E. Maciá, Phys. Rev. B64, 094206 (2001).

    J. Delahaye, J. P. Brison, and C. Berger, Phys. Rev. Lett. 81, 4204 (1998).

    K. Kirihara and K. Kimura, J. Appl. Phys. 92, 979 (2002)JAPIAU000092000002000979000001.

    P. A. Kalugin, M. A. Chernikov, A. Bianchi, and H. R. Ott, Phys. Rev. B 53, 14145 (1996).


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