Strongly Decoupled Europium and Iron Vibrational Modes in Filled Skutterudites

Author

Gary J. Long, Missouri University of Science and TechnologyFollow
Raphäel P. Hermann
Fernande Grandjean, Missouri University of Science and TechnologyFollow
Ercan E. Alp
Wolfgang Sturhahn
Charles E. Johnson
Dennis E. Brown
Olaf Leupold
Rudolf Rüffer

Abstract

The europium partial vibrational density of states (DOS) in EuFe₄Sb₁₂ and the iron partial vibrational DOS in both EuFe₄Sb₁₂ and Ce⁵⁷Fe₄Sb₁₂ have been obtained by nuclear inelastic scattering. The results reveal the strong independence of the iron and rare-earth vibrational modes. The cage filling europium only participates significantly to the low-energy local vibrational modes. The force constants have been obtained from the measured probability of nuclear absorption. The energies of the peaks in the europium and iron DOS are in excellent agreement with the calculated DOS in LaFe₄Sb₁₂. The results indicate that nuclear inelastic scattering is the technique of choice for the study of the localized vibrational modes in thermoelectric "phonon glass" materials.

Recommended Citation

G. J. Long et al., "Strongly Decoupled Europium and Iron Vibrational Modes in Filled Skutterudites," Physical review B: Condensed matter and materials physics, vol. 71, no. 14, American Physical Society (APS), Apr 2005.

The definitive version is available at https://doi.org/10.1103/PhysRevB.71.140302

Department(s)

Chemistry

Keywords and Phrases

Antimony Alloys; Europium Alloys; Alloys; Iron; Lead-antimony alloys

International Standard Serial Number (ISSN)

1098-0121

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2005 American Physical Society (APS), All rights reserved.

Publication Date

01 Apr 2005