Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorDeng, G-
dc.contributor.authorCao, Y-
dc.contributor.authorRen, W-
dc.contributor.authorCao, S-
dc.contributor.authorStuder, AJ-
dc.contributor.authorGauthier, N-
dc.contributor.authorKenzelmann, M-
dc.contributor.authorDavison, G-
dc.contributor.authorRule, KC-
dc.contributor.authorGardner, JS-
dc.contributor.authorImperia, P-
dc.contributor.authorUlrich, C-
dc.contributor.authorMcIntyre, GJ-
dc.identifier.citationDeng, G., Cao, Y., Ren, W., Cao, S., Studer, A., Gauthier, N., Kenzelmann, M., Davison, G., Rule, K., Gardner, J. Imperia, P., Ulrich, C., & McIntyre, G. (2017). Origin of magnetoelectric coupling effect and spin dynamics of multiferroic system Co4Nb2O9. Paper presented at ICNS 2017 (International Conference on Neutron Scattering), Daejeon, South Korea, 9 to 13 July 2017. Retrieved from:
dc.description.abstractCo4Nb2O9,was recently reported to have large magnetoelectric coupling effect under a certain magnetic field.[1,2] This compound has a crystal structure (space group P-3c1) derived from corundum structure and undergoes antiferromagnetic phase transition around 27K. It was previously believed that the magnetic moments of Co2+ order into a collinear antiferromagnetic structure in which magnetic moments are parallel to the c axis and form ferromagnetic chains with antiparallel inter-chain coupling.[3] However, the recent study has shown that this magnetic structure model is incorrect.[4] In this study, we found that the Co2+magnetic moments on both Co1 and Co2 sites align in the ab plane with a non-collinear configuration. Using inelastic neutron scattering, we measured the spin wave excitation from its magnetic phase along (h00) and (00l). A spin dynamic model proposed in this study is able to explain the observed spin dynamical behavior quite well. The nearest and next nearest neighbor interactions (NN and NNN) along the c axis are ferromagnetic. The interaction on the zig-zag ring of Co1 perpendicular to the c axis is highly frustrated while that of the zig-zag ring of Co2 is antiferromagnetic. The single ion anisotropy and Dzyaloshinskii-Moriya (DM) interaction contribute to the spin dynamics of Co4Nb2O9 as well. The simulated spin wave excitation by using SpinW[5] matches the experimental data very well. The DM interaction, which is most probably due to the triangle Co2-O-Co2 bond, was found to be the origin of the magnetoelectric coupling in this compound.en_US
dc.publisherInternational Conference on Neutron Scatteringen_US
dc.subjectElectrical propertiesen_US
dc.subjectMagnetic fieldsen_US
dc.subjectCrystal structureen_US
dc.subjectMagnetic momentsen_US
dc.subjectPhase transformationsen_US
dc.subjectNeutron diffractionen_US
dc.titleOrigin of magnetoelectric coupling effect and spin dynamics of multiferroic system Co4Nb2O9en_US
dc.typeConference Abstracten_US
Appears in Collections:Conference Publications

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.