Magnetic structure and spin dynamics of multiferroic system Co4Nb2O9

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dc.contributor.authorDeng, GCen_AU
dc.contributor.authorCao, YMen_AU
dc.contributor.authorRen, Wen_AU
dc.contributor.authorCao, SXen_AU
dc.contributor.authorGauthier, Nen_AU
dc.contributor.authorKenzelmann, Men_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorRule, KCen_AU
dc.contributor.authorGardner, JSen_AU
dc.contributor.authorDavison, Gen_AU
dc.contributor.authorImperia, Pen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.date.accessioned2021-12-15T01:38:33Zen_AU
dc.date.available2021-12-15T01:38:33Zen_AU
dc.date.issued2017-02-01en_AU
dc.date.statistics2011-09-24en_AU
dc.description.abstractCo4Nb2O9, was recently reported to have large magneto-dielectric coupling effect under a certain magnetic field. This compound has a corundum-type crystal structure of space group P-3c1 of ref. 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. However, the recent study has shown that this magnetic structure model is incorrect. 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. en_AU
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: https://physics.org.au/wp-content/uploads/cmm/2017/Wagga_2017_Conference_Handbook.pdfen_AU
dc.identifier.conferenceenddate3 February 2017en_AU
dc.identifier.conferencenameAustralian and New Zealand Institutes of Physics 41st Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, NSWen_AU
dc.identifier.conferencestartdate31 January 2017en_AU
dc.identifier.otherWN3en_AU
dc.identifier.pagination34en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2017/Wagga_2017_Conference_Handbook.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12459en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectSpinen_AU
dc.subjectDynamicsen_AU
dc.subjectCobalten_AU
dc.subjectNiobiumen_AU
dc.subjectCouplingen_AU
dc.subjectAntiferromagnetic materialsen_AU
dc.subjectCrystal structureen_AU
dc.subjectInelastic scatteringen_AU
dc.subjectSpin wavesen_AU
dc.titleMagnetic structure and spin dynamics of multiferroic system Co4Nb2O9en_AU
dc.typeConference Presentationen_AU
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