CePt4Ge12: Intermediate Valence or true Kondo system ?
Rare-earth filled skutterudites exhibit a large variety of topical magnetic and electrical properties. Very recently skutterudites with chemical formula REPt4Ge12 have been synthesized [1]. They crystallize in the body-centered cubic, Im-3, structure. Detailed macroscopic measurements performed on the CePt4Ge12 let suppose that this compound is at the border between an intermediate valence (IV) and a Kondo lattice behavior. Its magnetic susceptibility shows a wide bump around 75-80 K, as typically observed in IV systems. However the value of the Kadowaki and Woods ratio is closer to what is expected for transition metals, than those reported in heavy-fermion systems. This makes the case of CePt4Ge12 very intriguing. In order to discriminate between IV or Kondo lattice behavior in CePt4Ge12, we propose a study by inelastic neutron scattering. This technique is very powerful to study such systems.
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GALERA Rose Marie; NEYRET-GIGOT Séverin; C. Opagiste; ROLS Stephane and TROYAN Hugo. (2013). CePt4Ge12: Intermediate Valence or true Kondo system ?. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1315
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