On the strongly correlated electron hydride Ce2Ni2MgH7.7
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHEVALIER, Bernard | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | KROLAK, Aleksandra A. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BOBET, Jean-Louis | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GAUDIN, Etienne | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WEILL, François | |
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | HERMES, Wilfried | |
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | PÖTTGEN, Rainer | |
| dc.date.issued | 2008 | |
| dc.identifier.issn | 0020-1669 | |
| dc.description.abstractEn | The intermediate valence compound Ce2Ni2Mg absorbs irreversibly hydrogen when exposed under 1 MPa of H2 pressure at room temperature. The resulting hydride Ce2Ni2MgH7.7 is stable in air and crystallizes as the deuteride La2Ni2MgD8 in a monoclinic structure (space group P21/c) with the unit cell parameters a = 11.7620(2), b = 7.7687(2), and c = 11.8969(2) Å and β = 92.75°. The H-insertion in Ce2Ni2Mg induces a structural transition from a tetragonal to a monoclinic symmetry with an unit cell volume expansion ΔVm/Vm ≈ 24.9%. The investigation of the hydride by magnetization, electrical resistivity, and specific heat measurements indicates a change from an intermediate valence behavior to a non-magnetic strongly correlated electron system. This transition results from a change of the coupling constant Jcf between 4f(Ce) and conduction electrons induced by the hydrogenation. | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.subject.en | Hydride | |
| dc.subject.en | Intermetallic based on Cerium | |
| dc.subject.en | Valence transition | |
| dc.subject.en | Strongly correlated electron system | |
| dc.title.en | On the strongly correlated electron hydride Ce2Ni2MgH7.7 | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/ic801076b | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Inorganic Chemistry | |
| bordeaux.page | 10419-10424 | |
| bordeaux.volume | 47 | |
| bordeaux.issue | 22 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00338345 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00338345v1 | |
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