Article (Scientific journals)
Einstein oscillators in thallium filled antimony skutterudites
Hermann, Raphaël; Jin, R. J.; Schweika, W. et al.
2003In Physical Review Letters, 90 (13)
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Abstract :
[en] Inelastic neutron scattering measurements on several Tl filled skutterudites (Tl0.5Co3.5Fe0.5Sb12, Tl0.8Co3FeSb12, and Tl0.8Co4Sb11Sn) all show a sharp peak in the vibrational density of states at 57 +/- 2 K, which is absent in the unfilled skutterudite CoSb3. Heat capacity measurements on Tl0.8Co4Sb11Sn as compared to CoSb3 are consistent with the presence of a localized vibrational mode associated with the "rattling" thallium atoms in this filled skutterudite compound. Both results are well described by a localized Einstein mode model with an Einstein temperature Theta(E) of 53 +/- 1 K. These data provide perhaps the clearest example of local mode behavior in a concentrated metallic system.
Disciplines :
Physics
Author, co-author :
Hermann, Raphaël ;  Université de Liège - ULiège > Département de physique > Département de physique
Jin, R. J.
Schweika, W.
Grandjean, Fernande ;  Université de Liège - ULiège > Département de physique > Département de physique
Mandrus, D.
Sales, B. C.
Long, G. J.
Language :
English
Title :
Einstein oscillators in thallium filled antimony skutterudites
Publication date :
2003
Journal title :
Physical Review Letters
ISSN :
0031-9007
eISSN :
1079-7114
Publisher :
American Physical Society, Ridge, United States - New York
Volume :
90
Issue :
13
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 October 2011

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