Magnetic structure and spin correlations in magnetoelectric honeycomb Mn4Ta2O9

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dc.contributor.authorNarayanan, Nen_AU
dc.contributor.authorSenyshyn, Aen_AU
dc.contributor.authorMikhailova, Den_AU
dc.contributor.authorFaske, Ten_AU
dc.contributor.authorLu, Ten_AU
dc.contributor.authorLiu, Zen_AU
dc.contributor.authorWeise, Ben_AU
dc.contributor.authorEhrenberg, Hen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorHutchison, WDen_AU
dc.contributor.authorFuess, Hen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorLiu, Yen_AU
dc.contributor.authorYu, DHen_AU
dc.date.accessioned2021-12-17T02:02:17Zen_AU
dc.date.available2021-12-17T02:02:17Zen_AU
dc.date.issued2018-10-22en_AU
dc.date.statistics2021-11-30en_AU
dc.description.abstractWe elucidate the magnetic interactions and the role of spin (electron) correlation in determining the ground state of the honeycomb compound Mn4Ta2O9, by neutron powder diffraction, inelastic neutron scattering (INS), specific-heat (CP) measurements, and electronic-structure calculations. The antiferromagnetic long-range order with moments along c occurs at 102 K with strong exchange striction and small anisotropy. It is escribed by the three-dimensional Ising model. Diffuse magnetic scattering has been observed above TN, which is attributed to the two-dimensional spin correlations within the Mn2+ honeycombs. This is confirmed by the calculated exchange constants. INS experiments and spin-wave simulations together with CP measurements reveal two gapped modes on the ab plane, originating from the rotation of the spins away from the easy axis c. The magnetic anisotropy is mainly determined by an electron-correlation-assisted dipole-dipole interaction. This work provides insight into the competing origins of the magnetic anisotropy, which leads to different magnetic ground states in the family of honeycomb compounds. ©2018 American Physical Societyen_AU
dc.identifier.articlenumber134438en_AU
dc.identifier.citationNarayanan, N., Senyshyn, A., Mikhailova, D., Faske, T., Lu, T., Liu, Z., Weise, B., Ehrenberg, H., Mole, R. A., Hutchison, W. D., Fuess, H., McIntyre, G. J., Liu, Y., & Yu, D. (2018). Magnetic structure and spin correlations in magnetoelectric honeycomb Mn4Ta2O9. Physical Review B, 98, 134438. doi:10.1103/PhysRevB.98.134438en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/PhysRevB.98.134438en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12534en_AU
dc.identifier.volume98en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectSpinen_AU
dc.subjectGround statesen_AU
dc.subjectSpecific heaten_AU
dc.subjectNeutron diffractionen_AU
dc.subjectInelastic scatteringen_AU
dc.subjectElectronic structureen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectMagnetic momentsen_AU
dc.subjectAnisotropyen_AU
dc.titleMagnetic structure and spin correlations in magnetoelectric honeycomb Mn4Ta2O9en_AU
dc.typeJournal Articleen_AU
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