Dzyaloshinsky-Moriya driven helical-butterfly structure in Ba3NbFe3Si2O14

Abstract

We have used soft x-ray magnetic diffraction at the Fe3+ L2,3 edges to examine to what extent the Dzyaloshinsky-Moriya interaction in Ba3NbFe3Si2O14 influences its low temperature magnetic structure. A modulated component of the moments along the c-axis is present, adding to the previously proposed helical magnetic configuration of co-planar moments in the a,b-plane. This leads to a helical-butterfly structure and suggests that both the multi-axial in-plane and the uniform out-of-plane Dzyaloshinsky-Moriya vectors are relevant. A non zero orbital magnetic signal is also observed at the oxygen K edge, which reflects the surprisingly strong hybridization between iron 3d and oxygen 2p states, given the nominal spherical symmetry of the Fe3+ half filled shell.

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• Magnetic Control of Ferroelectric Polarization in a Self-formed Single Magnetoelectric Domain of Multiferroic Ba3NbFe3Si2O14
• Effect of divalent Ba cation substitution with Sr on coupled multiglass state in the magnetoelectric multiferroic compound Ba3NbFe3Si2O14
• Helical bunching and symmetry lowering inducing multiferroicity in Fe langasites
• Crystal Symmetry Lowering in Chiral Multiferroic Ba${}_3$TaFe${}_3$Si${}_2$O${}_{14}$ observed by X-Ray Magnetic Scattering
• Direct observation of electron density reconstruction at the metal-insulator transition in NaOsO3
• Conical spin order with chiral quadrupole helix in CsCuCl3
• Intertwined Spin and Orbital Density Waves in MnP Uncovered by Resonant Soft X-ray Scattering
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• Spin-wave directional anisotropies in antiferromagnetic Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Multiferroic domain relaxation in (NH4)2[FeCl5(H2O)]