CONSTABLE, E.; RAYMOND, S.; PETIT, S.; RESSOUCHE, E.; BOURDAROT, F.; DEBRAY, J.; JOSSE, Michaël; FABELO, O.; BERGER, H.; DE BRION, S.; SIMONET, V.

doi:10.1103/PhysRevB.96.014413

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CONSTABLE, E.
Magnétisme et Supraconductivité [NEEL - MagSup]

RAYMOND, S.
Magnétisme et Diffusion Neutronique [MDN]

PETIT, S.
Laboratoire Léon Brillouin [LLB - UMR 12]

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Article de revue

Ce document a été publié dans

Physical Review B. 2017, vol. 96, n° 1, p. 014413

American Physical Society

Résumé en anglais

We report a single-crystal neutron diffraction and inelastic neutron scattering study on the spin 1/2 cuprate Cu3Bi(SeO3)2O2Cl, complemented by dielectric and electric polarization measurements. The study clarifies a number of open issues concerning this complex material, whose frustrated interactions on a kagomelike lattice, combined with Dzyaloshinskii-Moriya interactions, are expected to stabilize an exotic canted antiferromagnetic order. In particular, we determine the nature of the structural transition occurring at 115 K, the magnetic structure below 25 K resolved in the updated space group, and the microscopic ingredients at the origin of this magnetic arrangement. This was achieved by an analysis of the measured gapped spin waves, which signifies the need for an unexpected and significant anisotropic exchange beyond the proposed Dzyaloshinskii-Moriya interactions. Finally, we discuss the multiferroic properties of this material with respect to the space group symmetries.< Réduire

DOI

http://dx.doi.org/10.1103/PhysRevB.96.014413

Project ANR

Effets magnéto-électriques dynamiques : études expérimentale et théorique des excitations hybrides - ANR-13-BS04-0013

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026