| Autor: |
Marty, Karol, Simonet, Virginie, Ressouche, Eric, Ballou, Rafik, Lejay, Pascal, Bordet, Pierre |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Physical Review Letters 101, 24 (2008) 247201 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.101.247201 |
| Popis: |
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. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
