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Incommensurate and commensurate magnetic structures of the ternary germanide CeNiGe3

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDURIVAULT, Laurence
hal.structure.identifierLaboratoire Léon Brillouin [LLB - UMR 12]
dc.contributor.authorBOURÉE, Françoise
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHEVALIER, Bernard
hal.structure.identifierLaboratoire Léon Brillouin [LLB - UMR 12]
dc.contributor.authorANDRÉ, Gilles
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWEILL, François
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorETOURNEAU, Jean
hal.structure.identifierFacultad de Ciencas [Madrid]
dc.contributor.authorMARTINEZ-SAMPER, P.
hal.structure.identifierFacultad de Ciencas [Madrid]
dc.contributor.authorRODRIGO, J. G.
hal.structure.identifierFacultad de Ciencas [Madrid]
dc.contributor.authorSUDEROW, H.
hal.structure.identifierFacultad de Ciencas [Madrid]
dc.contributor.authorVIEIRA, S.
dc.date.issued2003
dc.identifier.issn0953-8984
dc.description.abstractEnThe structural properties of CeNiGe3 have been investigated via electron diffraction and neutron powder diffraction (NPD). This ternary germanide crystallizes in the orthorhombic SmNiGe3-type structure (Cmmm space group). Electrical resistivity, ac- and dc-magnetization measurements show that CeNiGe3 orders antiferromagnetically below TN = 5.5(2) K and exclude the occurrence at low temperatures of a spin-glass state for CeNiGe3 as previously reported. Specific heat measurements and NPD both reveal two magnetic transitions, observed at TN1 = 5.9(2) K and TN2 = 5.0(2) K. Between TN1 and TN2, the Ce magnetic moments in CeNiGe3 are ordered in a collinear antiferromagnetic structure associated with the k1 = (100) wavevector and showing a relationship with the magnetic structure of the Ce3Ni2Ge7 ternary germanide. Below TN2, this k1 = (100) commensurate magnetic structure coexists with an incommensurate helicoîdal magnetic structure associated with k2 = (00.409(1)1/2). This last magnetic structure is highly preponderant below TN2 (93(5)% in volume). At 1.5 K, the Ce atoms in CeNiGe3 carry a reduced ordered magnetic moment (0.8(2) μB). This value, smaller than that obtained in Ce3Ni2Ge7, results from an important hybridization of the 4f(Ce) orbitals with those of the Ni and Ge ligands.
dc.language.isoen
dc.publisherIOP Publishing
dc.subject.enAntiferromagnetic ordering
dc.subject.enCrystal structure
dc.subject.enElectric resistance
dc.subject.enHeat capacity
dc.subject.enMagnetic moment
dc.subject.enMagnetic spin glasses
dc.subject.enMagnetic structure
dc.subject.enMagnetic transition
dc.subject.enMagnetization
dc.subject.enNeutron diffraction
dc.title.enIncommensurate and commensurate magnetic structures of the ternary germanide CeNiGe3
dc.typeArticle de revue
dc.identifier.doi10.1088/0953-8984/15/2/308
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Physics: Condensed Matter
bordeaux.page77-90
bordeaux.volume15
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-00258293
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00258293v1
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