Magnetic characterization of the non centrosymmetric Ba3NbFe3Si2O14 langasite

Karol Marty (1) , Virginie Simonet (2) , Pierre Bordet (1) , Rafik Ballou (2) , Pascal Lejay (3) , Olivier Isnard (1) , Eric Ressouche (4) , Frédéric Bourdarot (4, 5) , Pierre Bonville (6, 7)

1 NEEL - MRS - Matériaux, Rayonnements, Structure
2 NEEL - MagSup - Magnétisme et Supraconductivité
3 NEEL - C2MA - Croissance Cristalline et MicroAnalyse
4 SPSMS - UMR 9001 - Service de Physique Statistique, Magnétisme et Supraconductivité
5 MDN - Magnétisme et Diffusion Neutronique
6 IRAMIS - Institut Rayonnement Matière de Saclay (DRF)
7 SPEC - UMR3680 - Service de physique de l'état condensé

The potential relevance of the Ba3NbFe3Si2O14 langasite in the field of multiferroism was investigated. Interesting properties were expected, in particular in view of the frustrating stacking of its magnetic Fe3+ cations into triangular planes of triangle units. We hereafter report results of specific heat and magnetic measurements, Mo¨ ssbauer spectroscopy and neutron diffraction. A peculiar magnetic structure is found out at low temperature. The Fe3+ magnetic moments adopt a triangular 1201 configuration within each triangle, which is in-phase propagated in each triangular plane and is helically modulated from plane to plane

Mots clés: Frustrated magnetism; Piezoelectricity; Chirality

Domaines: Electrons fortement corrélés [cond-mat.str-el]

Karol Marty, Virginie Simonet, Pierre Bordet, Rafik Ballou, Pascal Lejay, et al.. Magnetic characterization of the non centrosymmetric Ba3NbFe3Si2O14 langasite. Journal of Magnetism and Magnetic Materials, 2009, 321 (11), pp.1778-1781. ⟨10.1016/j.jmmm.2009.02.032⟩. ⟨hal-00375762⟩