title: Influence of Ce-H bonding on the physical properties of the hydrides CeCoSiH(1.0) and CeCoGeH(1.0).
abstract: The hydrides CeCoSiH(1.0) and CeCoGeH(1.0) which crystallize like the parent antiferromagnetic compounds CeCoSi and CeCoGe in the tetragonal CeFeSi-type structure, have been investigated by specific heat and thermoelectric power measurements and (1)H nuclear magnetic resonance (NMR). CeCoSiH(1.0) is an intermediate valence compound whereas CeCoGeH(1.0) can be considered as a nearly trivalent cerium compound. This behaviour is corroborated by the occurrence of a slight broadening of the (1)H NMR signal in the sequence [Formula: see text]. The band structure calculations performed on these hydrides reveal the existence of strong bonding Ce-H interaction, found to be larger in CeCoSiH(1.0) than in CeCoGeH(1.0).
authors.affiliation: Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), CNRS [UPR 9048], Université Bordeaux 1, Avenue du Docteur A Schweitzer, 33608 Pessac Cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Chevalier
authors.forename: S F
authors.initials: SF
authors.lastname: Matar
authors.forename: M
authors.initials: M
authors.lastname: Ménétrier
authors.forename: J Sanchez
authors.initials: JS
authors.lastname: Marcos
authors.forename: J Rodriguez
authors.initials: JR
authors.lastname: Fernandez