Publications in Scientific Journals:

E. Alleno, D. Berardan, C. Godart, M. Puyet, B. Lenoir, R. Lackner, E. Bauer, L. Girard, D. Ravot:
"Double filling in skutterudites: A promising path to improved thermoelectric properties";
Physica B: Condensed Matter, 383 (2006), 103 - 106.

English abstract:
Double filling in skutterudites: A promising path to improved thermoelectric properties

E. Alleno a, D. Bérardan a, C. Godart a, M. Puyet b, B. Lenoir b, R. Lackner c, E. Bauer c, L. Girard d and D. Ravot d

a LCMTR-CNRS, ISCSA, 2-8 rue H. Dunant, 94320 THIAIS, France
b LPM, UMR7556, ENSMN, Parc de Saurupt, 54042 Nancy, France
c Institute of Solid State Physics, TU Vienna, A-1040 Vienna, Austria
d LPMC, UMR5617, Université de Montpellier 2, 34095 Montpellier, France

Available online 11 May 2006.


We have investigated the thermoelectric properties of the Ce0.9-yYbyFe4Sb12 series as well as those of a few compounds in the series Cey/2Yby/2Fe4-xCoxSb12. In the former series, increasing the Yb fraction decreases the resistivity and the Seebeck coefficient. These effects are related to the fact that Yb is not trivalent in this series. In Ce0.40Yb0.53Fe4Sb12, the phonon part of the thermal conductivity is strongly reduced compared to Ce0.85Fe4Sb12, leading to a larger figure of merit. We think that the increase of the mass and bonding fluctuations on the rare-earth site would be the main reason for this reduction. In the latter series, an extrapolated value of ZT=0.95 at 800 K was obtained in not yet optimized Ce0.44Yb0.32Fe3.02Co0.98Sb12.

Keywords: Skutterudites; Seebeck coefficient; Electrical resistivity; Thermal conductivity; Thermoelectricity

PACS classification codes: 63.20.Pw; 72.15.Eb; 72.15.Gd; 72.15.Jf

Physica B: Condensed Matter
Volume 383, Issue 1 , 15 August 2006, Pages 103-106
Proceedings of the Third Hiroshima Workshop on Novel Functional Materials with Multinary Freedoms

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Created from the Publication Database of the Vienna University of Technology.