Abstract
The specific lattice dynamic properties of antimony in the unfilled CoSb3 and filled EuFe4Sb12 skutterudites have been determined by nuclear inelastic scattering at the 121Sb nuclear resonance energy of 37.1298(2) keV with a 4.5 meV high-resolution backscattering sapphire monochromator. The Sb partial vibrational density of states (DOS) shows a maximum centered at 17 and 16 meV in CoSb3 and EuFe4Sb12, respectively. The difference between the Sb DOSs of CoSb3 and EuFe4Sb12 reveals that upon filling there is a transfer of 10% of the vibrational states toward lower energy. Further, a likely indication of the coupling between the guest and the host lattice in rattler systems is observed, a coupling that is required to reduce the lattice thermal conductivity.
Recommended Citation
H. C. Wille and R. P. Hermann and I. Sergueev and O. Leupold and P. Van Der Linden and B. C. Sales and F. Grandjean and G. J. Long and R. Rüffer and Y. V. Shvyd'ko, "Antimony Vibrations in Skutterudites Probed by ¹²¹Sb Nuclear Inelastic Scattering," Physical review B: Condensed matter and materials physics, vol. 76, no. 14, American Institute of Physics (AIP), Oct 2007.
The definitive version is available at https://doi.org/10.1103/PhysRevB.76.140301
Department(s)
Chemistry
Sponsor(s)
United States. Department of Energy
Keywords and Phrases
Cobalt Compounds; Europium Compounds; Iron Compounds; Lattice Dynamics
International Standard Serial Number (ISSN)
1098-0121
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2007 American Institute of Physics (AIP), All rights reserved.
Publication Date
01 Oct 2007
