Transport, magnetic and thermal properties of amorphous and crystallized Ce2Ni2Ga ternary gallide

Glenn Orveillon (1) , Bernard Chevalier (1) , Stéphane Gorsse (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Ce2Ni2Ga has been prepared in both amorphous and crystallized form. The first one has been obtained by melt-spinning process. Electrical resistivity, magnetic susceptibility, heat capacity and Seebeck coefficient measurements have been carried out on these two forms. A valence transition from intermediate valence (IV) behavior (crystallized) to a trivalent (Ce3+) behavior (amorphous) of the cerium have been pointed out in this study. Actually, the atomic disorder induces a valence transition visible in magnetic, calorimetric and thermopower measurements. This observation tends to show that the local environment of cerium is changed.

Mots clés: Metallic glasses; Kondo effect

Domaines: Matériaux

Glenn Orveillon, Bernard Chevalier, Stéphane Gorsse. Transport, magnetic and thermal properties of amorphous and crystallized Ce2Ni2Ga ternary gallide. Journal of Alloys and Compounds, 2008, 463 (1-2), pp.569-575. ⟨10.1016/j.jallcom.2007.10.078⟩. ⟨hal-00319596⟩