Antimony vibrations in skutterudites probed by Sb-121 nuclear inelastic scattering

[en] The specific lattice dynamic properties of antimony in the unfilled CoSb3 and filled EuFe4Sb12 skutterudites have been determined by nuclear inelastic scattering at the Sb-121 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.

Disciplines :

Physics

Author, co-author :

Wille, H-C

Hermann, Raphaël ; Université de Liège - ULiège > Département de physique > Département de physique

Sergueev, I.

Leupold, O.

van der Linden, P.

Sales, B. C.

Grandjean, François-Xavier ; Centre Hospitalier Universitaire de Liège - CHU > Imagerie médicale

Long, Gary J

Rueffer, R.

Shvyd'ko, Yu V

Language :

English

Title :

Antimony vibrations in skutterudites probed by Sb-121 nuclear inelastic scattering

Publication date :

2007

Journal title :

Physical Review. B, Condensed Matter and Materials Physics

ISSN :

1098-0121

eISSN :

1550-235X

Publisher :

American Physical Society, Woodbury, United States - New York

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 13 December 2012

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