| Autor: |
Wille, H.-C., Hermann, R. P., Sergueev, I., Leupold, O., van der Linden, P., Sales, B. C., Grandjean, F., Long, F. J., Rüffer, R., Shvyd'ko, Yu. V. |
| Jazyk: |
angličtina |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
Physical review / B 76(14), 140301 (2007). doi:10.1103/PhysRevB.76.140301 |
| DOI: |
10.1103/PhysRevB.76.140301 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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