Filled skutterudite antimonides: Validation of the electron-crystal phonon-glass approach to new thermoelectric materials

Conference · Tue Apr 01 04:00:00 EST 1997

OSTI ID:542038

Mandrus, D; Dai, P; Keppens, V ^[1]

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1. Oak Ridge National Lab., TN (United States); and others

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 LaFe{sub 3}CoSb{sub 12}. It is likely that at least one of these modes represents the localized, incoherent vibrations of the La ion in an oversized atomic {open_quotes}cage.{close_quotes} These results support the usefulness of weakly bound, {open_quotes}rattling{close_quotes} ions for the improvement of thermoelectric performance.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 542038
• Report Number(s): LA-UR--97-1460; CONF-970302--; ON: DE98000834
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
ANTIMONIDES
ELECTROCHEMISTRY
MATERIALS TESTING
THERMOELECTRIC MATERIALS
THERMOELECTRIC PROPERTIES
THERMOELECTRICITY