Reference : Einstein oscillators in thallium filled antimony skutterudites
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/100417
Einstein oscillators in thallium filled antimony skutterudites
English
Hermann, Raphaël mailto [Université de Liège - ULg > Département de physique > Département de physique >]
Jin, R. J. [> > > >]
Schweika, W. [> > > >]
Grandjean, Fernande mailto [Université de Liège - ULg > Département de physique > Département de physique >]
Mandrus, D. [> > > >]
Sales, B. C. [> > > >]
Long, G. J. [> > > >]
2003
Physical Review Letters
American Physical Society
90
13
Yes (verified by ORBi)
0031-9007
1079-7114
Ridge
NY
[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.
http://hdl.handle.net/2268/100417
10.1103/PhysRevLett.90.135505

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