Kondo effect, crystalline electric fields and itinerant magnetism in antimony-based filled skutterudites

In CeFe4Sb12, itinerant paramagnetism from iron and localized paramagnetism of cerium coexist. For the cerium contribution to the electrical resistivity ρCe(T), magnetic susceptibility χCe(T) and heat capacity ΔCP(T), we find a maximum at around 130K. Below 2K, non-Fermi liquid behaviour is evidence...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2004-05, Vol.272-276, p.E113-E114
Main Authors: Viennois, R, Ravot, D, Terki, F, Hernandez, C, Charar, S, Haen, P, Paschen, S, Steglich, F
Format: Article
Language:English
Subjects:
Crystalline electric fields
Kondo holes
Non-Fermi liquid
Skutterudites
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Summary:In CeFe4Sb12, itinerant paramagnetism from iron and localized paramagnetism of cerium coexist. For the cerium contribution to the electrical resistivity ρCe(T), magnetic susceptibility χCe(T) and heat capacity ΔCP(T), we find a maximum at around 130K. Below 2K, non-Fermi liquid behaviour is evidenced from our heat capacity measurements on CeFe4Sb12. The invariance of the maximum to ρCe(T) upon substituting La for Ce indicates that the crystalline electric fields splitting (ΔCEF) has to be considered in addition to the Kondo effect with high Kondo temperature TK and ΔCEF/TK≈5.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2003.11.220