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| HAL : hal-00322722, version 3 |
| arXiv : 0809.3067 |
| DOI : 10.1103/PhysRevLett.101.247201 |
| Fiche détaillée |  Récupérer au format |
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| Physical Review Letters 101, 24 (2008) 247201 |
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| Versions disponibles : | v1 (18-09-2008) | v2 (18-09-2008) | v3 (14-12-2008) |
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| Single domain magnetic helicity and triangular chirality in structurally enantiopure Ba3NbFe3Si2O14 |
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| Karol Marty 1Virginie Simonet 1 |
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| (09/12/2008) |
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| A novel doubly chiral magnetic order is found out in the structurally chiral langasite compound Ba$_3$NbFe$_3$Si$_2$O$_{14}$. The magnetic moments are distributed over planar frustrated triangular lattices of triangle units. On each of these they form the same triangular configuration. This ferro-chiral arrangement is helically modulated from plane to plane. Unpolarized neutron scattering on a single crystal associated with spherical neutron polarimetry proved that a single triangular chirality together with a single helicity is stabilized in an enantiopure crystal. A mean field analysis allows discerning the relevance on this selection of a twist in the plane to plane supersuperexchange paths. |
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| 1 : | Institut Néel (NEEL) |
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CNRS : UPR2940 – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG) |
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| 2 : | Laboratoire de Magnétisme et Diffusion Neutronique (MDN) |
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CEA : DSM/INAC |
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| CorrElec;SPMCE;CrisMass |
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| Domaine | : | Physique/Matière Condensée/Electrons fortement corrélés |
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| magnetic frustration – multiferroism – chirality – neutron polarimetry |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00322722, version 3 | |
| http://hal.archives-ouvertes.fr/hal-00322722 | |
| oai:hal.archives-ouvertes.fr:hal-00322722 | |
| Contributeur : Virginie Simonet | |
| Soumis le : Dimanche 14 Décembre 2008, 20:23:16 | |
| Dernière modification le : Dimanche 14 Décembre 2008, 21:21:02 | |
