Competing exchange interactions on the verge of a metal-insulator transition in the two-dimensional spiral magnet Sr3Fe2O7

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dc.contributor.authorKim, JHen_AU
dc.contributor.authorJain, Aen_AU
dc.contributor.authorReehuis, Men_AU
dc.contributor.authorKhaliullin, Gen_AU
dc.contributor.authorPeets, DCen_AU
dc.contributor.authorUlrich, Cen_AU
dc.contributor.authorPark, JTen_AU
dc.contributor.authorFaulhaber, Een_AU
dc.contributor.authorHoser, Aen_AU
dc.contributor.authorWalker, HCen_AU
dc.contributor.authorAdroja, DTen_AU
dc.contributor.authorWalters, ACen_AU
dc.contributor.authorInosov, DSen_AU
dc.contributor.authorMaljuk, Aen_AU
dc.contributor.authorKeimer, Ben_AU
dc.date.accessioned2016-09-06T23:31:45Zen_AU
dc.date.available2016-09-06T23:31:45Zen_AU
dc.date.issued2014-10-03en_AU
dc.date.statistics2016-09-07en_AU
dc.description.abstractWe report a neutron scattering study of the magnetic order and dynamics of the bilayer perovskite Sr 3 Fe 2 O 7 , which exhibits a temperature-driven metal-insulator transition at 340 K. We show that the Fe 4+ moments adopt incommensurate spiral order below T N =115  K and provide a comprehensive description of the corresponding spin-wave excitations. The observed magnetic order and excitation spectra can be well understood in terms of an effective spin Hamiltonian with interactions ranging up to third-nearest-neighbor pairs. The results indicate that the helical magnetism in Sr 3 Fe 2 O 7 results from competition between ferromagnetic double-exchange and antiferromagnetic superexchange interactions whose strengths become comparable near the metal-insulator transition. They thus confirm a decades-old theoretical prediction and provide a firm experimental basis for models of magnetic correlations in strongly correlated metals. © 2014, American Physical Society.en_AU
dc.identifier.articlenumber147206en_AU
dc.identifier.citationKim, J. H., Jain, A., Reehuis, M. , Khaliullin, G., Peets, C., Ulrich, J. T., part, J. T., Faulhaber, E., Hoser, A., Walker, H. C., Adroja, D. T., Walters, A. C., Onosov, D. S., Maljul, A., & Keimer, B (2014). Competing exchange interactions on the verge of a metal-insulator transition in the two-dimensional spiral magnet Sr3Fe2O7. Physical Review Letters, 113(14), 147206. doi:10.1103/PhysRevLett.113.147206en_AU
dc.identifier.govdoc7064en_AU
dc.identifier.issn1079-7114en_AU
dc.identifier.issue14en_AU
dc.identifier.journaltitlePhysical Review Lettersen_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevLett.113.147206en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7477en_AU
dc.identifier.volume113en_AU
dc.language.isoenen_AU
dc.publisherAmerical Physical Societyen_AU
dc.subjectNeutronsen_AU
dc.subjectMagnetismen_AU
dc.subjectHamiltoniansen_AU
dc.subjectFerromagnetismen_AU
dc.subjectMetalsen_AU
dc.subjectExperiment planningen_AU
dc.titleCompeting exchange interactions on the verge of a metal-insulator transition in the two-dimensional spiral magnet Sr3Fe2O7en_AU
dc.typeJournal Articleen_AU
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