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Filled Skutterudite Antimonides: Validation of the Electron-Crystal Phonon-Glass Approach to New Thermoelectric Materials

Published online by Cambridge University Press:  15 February 2011

D. Mandrus ,
B. C. Sales ,
V. Keppens ,
B. C. Chakoumakos ,
P. Dai ,
L. A. Boatner ,
R. K. Williams ,
J. R. Thompson ,
T. W. Darling  and
A. Migliori
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D. Mandrus
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
B. C. Sales
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
V. Keppens
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
B. C. Chakoumakos
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
P. Dai
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
L. A. Boatner
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
R. K. Williams
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
J. R. Thompson
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
T. W. Darling
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
A. Migliori
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
M. B. Maple
Affiliation:
Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, CA 92093
D. A. Gajewski
Affiliation:
Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, CA 92093
E. J. Freeman
Affiliation:
Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, CA 92093
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Abstract

After a brief review of the transport and thermoelectric properties of filled skutterudite antimonides, we present resonant ultrasound, specific heat, and inelastic neutron scattering results that establish the existence of two low-energy vibrational modes in the filled skutterudite LaFe3CoSb12. It is likely that at least one of these modes represents the localized, incoherent vibrations of the La ion in an oversized atomic “cage.” These results support the usefulness of weakly bound, “rattling” ions for the improvement of thermoelectric performance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 478: Symposium Q – Thermoelectric Materials - New Directions and Approaches , 1997 , 199
Copyright
Copyright © Materials Research Society 1997

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References

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