| Autor: |
André M. Strydom, V.H. Tran, P. de V. du Plessis, Frank Steglich, A. Rabis, Michael Baenitz, Wilder Carrillo-Cabrera, Silke Paschen, Yu. Grin |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Journal of Physics and Chemistry of Solids. 63:1183-1188 |
| ISSN: |
0022-3697 |
| DOI: |
10.1016/s0022-3697(02)00160-9 |
| Popis: |
We present results of transport, magnetic, and calorimetric measurements on two f-electron based compounds: U 2 Ru 2 Sn and Eu 8 Ga 16 Ge 30 . We show that U 2 Ru 2 Sn shares several properties with the strongly correlated semimetal CeNiSn. These analogies suggest that in U 2 Ru 2 Sn a narrow energy gap (or pseudogap) opens which is one order of magnitude larger than the one of CeNiSn. The two modifications of the clathrate Eu 8 Ga 16 Ge 30 behave as local-moment ferromagnetic metals with relatively low Curie temperatures and small charge-carrier concentrations. The thermal conductivity is low and glass-like, as expected for filled-cage' systems. If, by modification of the Ga-Ge cages, a 'Kondo insulating' ground state could be realized, a high thermoelectric figure of merit associated with the (pseudo)gap opening would be expected. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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