Valence, spin, and orbital state of the Co ions in the one-dimensional Ca3Co2O6: an x-ray absorption and magnetic circular dichroism study

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dc.creatorBurnus, T.
dc.creatorHu, Z.
dc.creatorHaverkort, M. W.
dc.creatorCezar, J. C.
dc.creatorFlahaut, D.
dc.creatorHardy, V.
dc.creatorMaignan, A.
dc.creatorBrookes, N. B.
dc.creatorTanaka, A.
dc.creatorHsieh, H. -H.
dc.creatorLin, H. -J.
dc.creatorChen, C. -T.
dc.creatorTjeng, L. H.
dc.date2006-11-21
dc.date.accessioned2026-07-07T07:34:28Z
dc.date.available2026-07-07T07:34:28Z
dc.descriptionWe have investigated the valence, spin, and orbital state of the Co ions in the one-dimensional cobaltate Ca3Co2O6 using x-ray absorption and x-ray magnetic circular dichroism at the Co-L2,3 edges. The Co ions at both the octahedral Co_oct and trigonal Co_trig sites are found to be in a 3+ state. From the analysis of the dichroism we established a low-spin state for the Co_oct and a high-spin state with an anomalously large orbital moment of 1.7 muB at the Co3+ trig ions. This large orbital moment along the c-axis chain and the unusually large magnetocrystalline anisotropy can be traced back to the double occupancy of the d2 orbital in trigonal crystal field.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0611545
dc.identifierhttp://arxiv.org/abs/cond-mat/0611545
dc.identifierPhys. Rev. B 74, 245111 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.245111
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/119778
dc.subjectStrongly Correlated Electrons
dc.titleValence, spin, and orbital state of the Co ions in the one-dimensional Ca3Co2O6: an x-ray absorption and magnetic circular dichroism study
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