CHEVALIER, Bernard; BOBET, Jean-Louis; PASTUREL, Mathieu; GAUDIN, Etienne; ETOURNEAU, Jean

doi:10.1016/S0925-8388(02)01223-9

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CHEVALIER, Bernard
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

BOBET, Jean-Louis
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

PASTUREL, Mathieu
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Alloys and Compounds. 2003, vol. 356-357, p. 147-150

Elsevier

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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.< Leer menos

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Cerium compounds

X-ray diffraction

Intermediate valence

Hydrogenation

Magnetism

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

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