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Spin-lattice coupling induced phase transition in theS=2 frustrated antiferromagnet CuMnO<sub>2</sub>

hal.structure.identifierLaboratoire Léon Brillouin [LLB - UMR 12]
dc.contributor.authorDAMAY, Françoise
hal.structure.identifierLaboratoire de cristallographie et sciences des matériaux [CRISMAT]
dc.contributor.authorPOIENAR, Maria
hal.structure.identifierLaboratoire de cristallographie et sciences des matériaux [CRISMAT]
dc.contributor.authorMARTIN, Christine
hal.structure.identifierLaboratoire de cristallographie et sciences des matériaux [CRISMAT]
dc.contributor.authorMAIGNAN, Antoine
hal.structure.identifierInstitut Laue-Langevin [ILL]
dc.contributor.authorRODRIGUEZ-CARJAVAL, Juan
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.authorDOUMERC, Jean-Pierre
dc.date.issued2009
dc.identifier.issn1098-0121
dc.description.abstractEnThe crystal and magnetic structures of the layered oxide crednerite CuMnO2 have been studied by neutron powder diffraction. In this system, which is topologically representative of a frustrated square lattice with nearest (J1) and diagonal next-nearest- (J2) neighbor interactions, three-dimensional antiferromagnetic ordering is observed below TN=65 K, with propagation vector k1=(−1/21/21/2). Frustration is relieved through a strong magnetoelastic coupling to the lattice, evidenced by a structural phase transition from a monoclinic (C2/m) to a strained triclinic C1̅ phase as magnetic order sets in. The magnetic order observed, which is described as spins antiferromagnetically aligned along [1-1 0] and ferromagnetically aligned along [1 1 0], corresponds to the so-called collinear antiferromagnetic order predicted for a frustrated two-dimensional antiferromagnetic Heisenberg model on a square lattice for J2/J1>0.5 in the presence of spin-lattice coupling.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enSpin-lattice coupling induced phase transition in theS=2 frustrated antiferromagnet CuMnO<sub>2</sub>
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevB.80.094410
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
bordeaux.journalPhysical Review B: Condensed Matter and Materials Physics (1998-2015)
bordeaux.page094410
bordeaux.volume80
bordeaux.issue9
bordeaux.peerReviewedoui
hal.identifierhal-00498055
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00498055v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&amp;rft.date=2009&amp;rft.volume=80&amp;rft.issue=9&amp;rft.spage=094410&amp;rft.epage=094410&amp;rft.eissn=1098-0121&amp;rft.issn=1098-0121&amp;rft.au=DAMAY,%20Fran%C3%A7oise&amp;POIENAR,%20Maria&amp;MARTIN,%20Christine&amp;MAIGNAN,%20Antoine&amp;RODRIGUEZ-CARJAVAL,%20Juan&amp;rft.genre=article


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