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dc.contributor.authorDeng, G-
dc.contributor.authorCao, Y-
dc.contributor.authorRen, W-
dc.contributor.authorCao, S-
dc.contributor.authorGauthier, N-
dc.contributor.authorKenzelmann, M-
dc.contributor.authorStuder, AJ-
dc.contributor.authorRule, KC-
dc.contributor.authorGardner, JS-
dc.contributor.authorDavison, G-
dc.contributor.authorImperia, P-
dc.contributor.authorMcIntyre, GJ-
dc.identifier.citationDeng, G., Cao. Y., Ren, W., Cao, S., Gauthier, N., Kenzelmann, M., Studer, A., Rule, K., Gardner, J. S., Davison, G., Imperia, P., & McIntyre, G. J. (2017). Magnetic structure and spin dynamics of multiferroic system Co4Nb2O9. Paper presented to the 41st Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, NSW, Australia, 31st January - 3rd February 2017, (p.34). Retrieved from:
dc.description.abstractCo4Nb2O9, was recently reported to have large magneto-dielectric coupling effect under a certain magnetic field.[1,2] This compound has a corundum-type crystal structure of space group P-3c1 of ref. [3] and undergoes antiferromagnetic phase transition around 27 K. It was previously believed that the magnetic moments of Co2+ order into a collinear antiferromagnetic structure in which Co2+ spins order parallel to the c-direction 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 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 magnetic model was proposed to explain the observed spin dynamical behavior. There are two inequivalent Co sites, which form spin chains in an alternative way along c axis. Each Co2+ moment couples with its two inequivalent neighbors on the same chain with ferromagnetic interactions. Co2+ moments from each site form a zig-zag hexagonal ring perpendicular to the c axis, where antiferromagnetic interactions dominate. On the basis of this model, the observed spin wave spectra can be well simulated by SpinW. [5]en_US
dc.publisherAustralian Institute of Physicsen_US
dc.subjectAntiferromagnetic materialsen_US
dc.subjectCrystal structureen_US
dc.subjectInelastic scatteringen_US
dc.subjectSpin wavesen_US
dc.titleMagnetic structure and spin dynamics of multiferroic system Co4Nb2O9en_US
dc.typeConference Presentationen_US
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