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Magnetic structure and spin correlations in magnetoelectric honeycomb Mn4Ta2O9

Narayanan, Narendirakumar; Senyshyn, A; Mikhailova, D; Faske, T; Lu, Teng; Liu, Zhen; Weise, B; Ehrenberg, H; Mole, R A; Hutchison, Wayne; Fuess, H; McIntyre, G J; Liu, Yun; Yu, D

Description

We 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 described by the three-dimensional Ising model. Diffuse magnetic...[Show more]

dc.contributor.authorNarayanan, Narendirakumar
dc.contributor.authorSenyshyn, A
dc.contributor.authorMikhailova, D
dc.contributor.authorFaske, T
dc.contributor.authorLu, Teng
dc.contributor.authorLiu, Zhen
dc.contributor.authorWeise, B
dc.contributor.authorEhrenberg, H
dc.contributor.authorMole, R A
dc.contributor.authorHutchison, Wayne
dc.contributor.authorFuess, H
dc.contributor.authorMcIntyre, G J
dc.contributor.authorLiu, Yun
dc.contributor.authorYu, D
dc.date.accessioned2020-09-18T01:54:02Z
dc.date.available2020-09-18T01:54:02Z
dc.identifier.issn2469-9950
dc.identifier.urihttp://hdl.handle.net/1885/210642
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 described 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 Mn^2+ 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.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Physical Society
dc.rights©2018 American Physical Society
dc.sourcePhysical Review B
dc.titleMagnetic structure and spin correlations in magnetoelectric honeycomb Mn4Ta2O9
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume98
dc.date.issued2018
local.identifier.absfor030606 - Structural Chemistry and Spectroscopy
local.identifier.ariespublicationu4485658xPUB1535
local.publisher.urlhttp://prb.aps.org/
local.type.statusPublished Version
local.contributor.affiliationNarayanan, Narendirakumar, College of Science, ANU
local.contributor.affiliationSenyshyn, A, Technische Universitat Munchen
local.contributor.affiliationMikhailova, D, Leibniz Institute for Solid State and Materials Research (IFW)
local.contributor.affiliationFaske, T, Darmstadt University of Technology
local.contributor.affiliationLu, Teng, College of Science, ANU
local.contributor.affiliationLiu, Zhen, College of Science, ANU
local.contributor.affiliationWeise, B, Leibniz Institute for Solid State and Materials Research (IFW)
local.contributor.affiliationEhrenberg, H, Karlsruhe Institute of Technology
local.contributor.affiliationMole, R A, Australian Neutron Science and Technology Organisation
local.contributor.affiliationHutchison, Wayne, University of New South Wales, ADFA
local.contributor.affiliationFuess, H, Darmstadt University of Technology
local.contributor.affiliationMcIntyre, G J, Australian Neutron Science and Technology Organisation
local.contributor.affiliationLiu, Yun, College of Science, ANU
local.contributor.affiliationYu, D, Australian Neutron Science and Technology Organisation
local.bibliographicCitation.startpage134438-1
local.bibliographicCitation.lastpage134438-15
local.identifier.doi10.1103/PhysRevB.98.134438
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2020-06-23T00:55:42Z
local.identifier.scopusID2-s2.0-85055326313
local.identifier.thomsonID000447917300004
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/31060..."The published version can be archived in an Institutional Repository" from SHERPA/RoMEO site (as at 18/09/2020).
CollectionsANU Research Publications

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