Single domain magnetic helicity and triangular chirality in structurally enantiopure Ba3NbFe3Si2O14

Karol Marty; Virginie Simonet; Eric Ressouche; Rafik Ballou; Pascal Lejay; Pierre Bordet

doi:10.1103/PhysRevLett.101.247201

Single domain magnetic helicity and triangular chirality in structurally enantiopure Ba3NbFe3Si2O14

Strongly Correlated Electrons 2008-12-14 v2

Authors: Karol Marty , Virginie Simonet , Eric Ressouche , Rafik Ballou , Pascal Lejay , Pierre Bordet

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Abstract

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.

Keywords

frustrated magnetism magnetic structure chirality-induced spin selectivity

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@article{arxiv.0809.3067,
  title  = {Single domain magnetic helicity and triangular chirality in structurally enantiopure Ba3NbFe3Si2O14},
  author = {Karol Marty and Virginie Simonet and Eric Ressouche and Rafik Ballou and Pascal Lejay and Pierre Bordet},
  journal= {arXiv preprint arXiv:0809.3067},
  year   = {2008}
}

Single domain magnetic helicity and triangular chirality in structurally enantiopure Ba3NbFe3Si2O14

Abstract

Keywords

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