Structure and magnetic properties of the ternary gallides CeMGa (M=Mn, Co and Cu) and their hydrides

B. Chevalier, J. L. Bobet, M. Pasturel, E. Gaudin, J. Etourneau

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The ternary gallides CeMGa present various structural properties since CeMnGa, CeCoGa and CeCuGa crystallize, respectively, in the cubic MgCu2-, monoclinic CeCoAl-, and orthorhombic CeCu2-type structure. These compounds absorb hydrogen at room temperature but hydrogenation induces a change of the crystalline structure: (i) CeCoGaH3.0 and CeCuGaH0.8 adopt the hexagonal AlB2-type; (ii) on the contrary, the cubic MgCu2 structure is preserved for CeMnGaH1.6. Moreover, in some cases hydrogenation leads to a valence change for Ce. For instance, CeCoGa is considered as intermediate valence compound, whereas CeCoGaH3.0 contains Ce3+. This paper demonstrates that hydrogenation strongly influences the Kondo effect in these intermetallics.
Original languageEnglish
Pages (from-to)147-150
Number of pages4
JournalJournal of Alloys and Compounds
Volume356/357
Early online date19 Mar 2003
DOIs
Publication statusPublished - 11 Aug 2003

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