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dc.contributor.authorMcQueeney, R.J.
dc.contributor.authorDiallo, S.O.
dc.contributor.authorAntropov, V.P.
dc.contributor.authorSamolyuk, G.D.
dc.contributor.authorBroholm, C.
dc.contributor.authorNi, N.
dc.contributor.authorNandi, S.
dc.contributor.authorYethiraj, M.
dc.contributor.authorZaretsky, J.L.
dc.contributor.authorPulikkotil, J.J.
dc.contributor.authorKreyssig, A.
dc.contributor.authorLumsden, M.D.
dc.contributor.authorHarmon, B.N.
dc.contributor.authorCanfield, P.C.
dc.date.accessioned2009-12-29T18:26:21Z
dc.date.available2009-12-29T18:26:21Z
dc.date.issued2008-11-28
dc.identifier.citationPhysical Review Letters 28 Nov. 2008, vol.101, no.22, 227205 (4 pp.)en
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/33735
dc.description.abstractInelastic neutron scattering measurements of the magnetic excitations in CaFe2As2 indicate that the spin wave velocity in the Fe layers is exceptionally large and similar in magnitude to the cuprates. However, the spin wave velocity perpendicular to the layers is at least half as large that in the layer, so that the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Exchange constants derived from band structure calculations predict spin wave velocities that are consistent with the experimental data.en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.subjectneutron diffractionen
dc.subjectspin dynamicsen
dc.subjectspin wavesen
dc.subjectmagnetic superconductorsen
dc.subjectiron alloysen
dc.subjectexchange interactions (electron)en
dc.subjectcalcium alloysen
dc.subjectatomic force microscopyen
dc.subjectanisotropic three-dimensional magnetismen
dc.subjectmagnetic excitationsen
dc.subjectinelastic neutron scatteringen
dc.subjectspin wave velocityen
dc.subjectarsenic alloysen
dc.subjectantiferromagnetismen
dc.subjectab initio calculationsen
dc.subjecttwo-dimensional cupratesen
dc.subjectexchange constantsen
dc.subjectband structure calculationsen
dc.subjectCaFe2As2en
dc.titleAnisotropic three-dimensional magnetism in CaFe2As2en
dc.typeArticleen


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