Cerium LIII-edge X-ray Absorption Study of the CeₓFe₄₋yCoySb₁₂ Skutterudites
The cerium LIII-edge x-ray absorption near-edge spectra of the CexFe4-yCoySb12 compounds have been obtained at 295 K and unambiguously indicate that cerium is in the 4f1 electronic ground state for all values of 0.22≤x≤0.98 and 0.0≤y≤3.5. This stable trivalent state of cerium is in agreement with the proposed (CeFe4Sb12) 1-α(□Co4Sb12)α, solid solution structure, in which the cerium atoms are always surrounded by twelve antimony first neighbors and six iron second neighbors, the observed magnetic properties of CeFe4Sb12 and Ce0.9Fe3CoSb12, and the electronic structure of CeFe4Sb12 obtained from band-structure calculations.
F. Grandjean et al., "Cerium LIII-edge X-ray Absorption Study of the CeₓFe₄₋yCoySb₁₂ Skutterudites," Physical Review B - Condensed Matter and Materials Physics, American Physical Society (APS), Jan 2000.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevB.62.12569
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