Hydrogenation inducing antiferromagnetism in the heavy-fermion ternary silicide CeRuSi
| 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 | GAUDIN, Etienne | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | TENCÉ, Sophie | |
| hal.structure.identifier | Laboratoire de chimie du solide minéral [LCSM] | |
| dc.contributor.author | MALAMAN, Bernard | |
| hal.structure.identifier | Departamento de ciencias de la tierra y física de la materia condensada [CITIMAC] | |
| dc.contributor.author | RODRÍGUEZ FERNÁNDEZ, Jesus | |
| hal.structure.identifier | Laboratoire Léon Brillouin [LLB - UMR 12] | |
| dc.contributor.author | ANDRÉ, Gilles | |
| hal.structure.identifier | Laboratoire de Physique des Solides [LPS] | |
| dc.contributor.author | COQBLIN, B. | |
| dc.date.issued | 2008 | |
| dc.identifier.issn | 1098-0121 | |
| dc.description.abstractEn | The hydride CeRuSiH1.0 with space group P4/nmm was synthesized by exposure at 523 K of the heavy-fermion ternary silicide CeRuSi under 4 MPa of hydrogen gas. The investigation of the hydride by x-ray powder diffraction reveals that the hydrogenation induces a pronounced anisotropic expansion of the unit cell. Moreover, CeRuSiH1.0 presents two antiferromagnetic transitions at TN1=7.5(2) K and TN2=3.1(2) K evidenced by magnetization and specific heat measurements. Hydrogenation changes the moderate heavy-fermion compound CeRuSi, which has a gamma=220 mJ/mol K2, to an antiferromagnet, which has a smaller electronic coefficient gamma=26 mJ/mol K2. In other words, the hydrogen insertion diminishes the influence of the Kondo effect. The transition heavy-fermion behavior-->antiferromagnet can be well understood in terms of the classical Doniach diagram where the hydrogenation plays a role opposite to the pressure. The expansion of the lattice induced by hydrogen insertion is here much more important than the role of Ce-H bonding observed in other hydrogenated compounds CeCoSiH1.0 or CeCoGeH1.0, where an opposite transition (antiferromagnetic-->spin fluctuation) was evidenced. | |
| dc.language.iso | en | |
| dc.publisher | American Physical Society | |
| dc.subject.en | Alloys | |
| dc.subject.en | Heat capacity | |
| dc.subject.en | Spin glasses and other random magnets | |
| dc.subject.en | Heavy fermions | |
| dc.subject.en | Hydride | |
| dc.subject.en | Cerium | |
| dc.subject.en | Ruthenium | |
| dc.subject.en | Silicon | |
| dc.title.en | Hydrogenation inducing antiferromagnetism in the heavy-fermion ternary silicide CeRuSi | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevB.77.014414 | |
| dc.subject.hal | Chimie/Matériaux | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci] | |
| bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
| bordeaux.page | 014414 | |
| bordeaux.volume | 77 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00204432 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00204432v1 | |
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