Subpicometer-scale atomic displacements and magnetic properties in the oxygen-isotope substituted multiferroic DyMn O3

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dc.contributor.authorNarayanan, Nen_AU
dc.contributor.authorGraham, PJen_AU
dc.contributor.authorReynolds, Nen_AU
dc.contributor.authorLi, Fen_AU
dc.contributor.authorRovillain, Pen_AU
dc.contributor.authorHester, JRen_AU
dc.contributor.authorKimpton, JAen_AU
dc.contributor.authorYethiraj, Men_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorHutchison, WDen_AU
dc.contributor.authorUlrich, Cen_AU
dc.date.accessioned2021-12-17T03:10:45Zen_AU
dc.date.available2021-12-17T03:10:45Zen_AU
dc.date.issued2017-02-27en_AU
dc.date.statistics2021-11-30en_AU
dc.description.abstractWe have investigated DyMn16O3 and its isotopically substituted counterpart DyMn18O3 by neutron powder diffraction, x-ray diffraction, and heat capacity measurements to investigate the mechanism leading to its magnetically induced electric polarization. 18O isotope substitution does not influence the magnetic ordering temperature of the Mn ions TN,Mn or the multiferroic ordering temperature Tl coinciding with the onset of the spin spiral phase; however, it does reduce the ordering temperature of Dy into its incommensurate magnetic state TN,Dy from 7.0(1) K to 5.9(1) K. The temperature dependence of the magnetic propagation vector, qIC, changes with 18O substitution, while Tl remains almost constant, independent of qIC. Pronounced changes in the lattice parameters occur at the various phase transitions. Furthermore, distinct subpicometer-scale distortions of the MnO6 octahedra and displacements of the Dy ions are observed below the ferroelectric phase transition at Tl in both samples, pointing toward the mechanism for electric polarization and its coupling to the orbital degrees of freedom. ©2017 American Physical Societyen_AU
dc.identifier.articlenumber75154en_AU
dc.identifier.citationNarayanan, N., Graham, P. J., Reynolds, N., Li, F., Rovillain, P., Hester, J., Kimpton, J., Yethiraj, M., McIntyre, G. J., Hutchison, W. D., & Ulrich, C. (2017). Subpicometer-scale atomic displacements and magnetic properties in the oxygen-isotope substituted multiferroic DyMn O3. Physical Review B, 95(7), 075154. doi:10.1103/PhysRevB.95.075154en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue7en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/PhysRevB.95.075154en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12540en_AU
dc.identifier.volume95en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectSpecific heaten_AU
dc.subjectFerroelectric materialsen_AU
dc.subjectSpinen_AU
dc.subjectTemperature dependenceen_AU
dc.subjectPhase transformationsen_AU
dc.titleSubpicometer-scale atomic displacements and magnetic properties in the oxygen-isotope substituted multiferroic DyMn O3en_AU
dc.typeJournal Articleen_AU
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