Dzyaloshinskii-Moriya driven helical-butterfly structure in Ba3NbFe3Si2O14

Article

关键词: X-RAY-SCATTERING;    FORBIDDEN REFLECTIONS;    CIRCULAR-DICHROISM;    ORBITAL MOMENT;    CROSS-SECTION;    POLARIZATION;    DIFFRACTION;    DEPENDENCE;    CHIRALITY;    LATTICE;   

DOI  :  10.1103/PhysRevB.88.104417

来源: SCIE

【 摘 要 】

We have used soft x-ray magnetic diffraction at the Fe3+ L-2,L-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 coplanar moments in the a, b plane. This leads to a helical-butterfly structure and suggests that both the multiaxial in-plane and the uniform out-of-plane Dzyaloshinsky-Moriya vectors are relevant. A nonzero 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.

【 授权许可】

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