Ising magnetism and ferroelectricity in Ca$_3$CoMnO$_6$

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dc.creatorWu, Hua
dc.creatorBurnus, T.
dc.creatorHu, Z.
dc.creatorMartin, C.
dc.creatorMaignan, A.
dc.creatorCezar, J. C.
dc.creatorTanaka, A.
dc.creatorBrookes, N. B.
dc.creatorKhomskii, D. I.
dc.creatorTjeng, L. H.
dc.date2008-06-10
dc.date2008-12-04
dc.date.accessioned2026-07-07T12:29:23Z
dc.date.available2026-07-07T12:29:23Z
dc.descriptionThe origin of both the Ising chain magnetism and ferroelectricity in Ca$_3$CoMnO$_6$ is studied by $ab$ $initio$ electronic structure calculations and x-ray absorption spectroscopy. We find that Ca$_3$CoMnO$_6$ has the alternate trigonal prismatic Co$^{2+}$ and octahedral Mn$^{4+}$ sites in the spin chain. Both the Co$^{2+}$ and Mn$^{4+}$ are in the high spin state. In addition, the Co$^{2+}$ has a huge orbital moment of 1.7 $μ_B$ which is responsible for the significant Ising magnetism. The centrosymmetric crystal structure known so far is calculated to be unstable with respect to exchange striction in the experimentally observed $\uparrow\uparrow\downarrow\downarrow$ antiferromagnetic structure for the Ising chain. The calculated inequivalence of the Co-Mn distances accounts for the ferroelectricity.
dc.description4 pages, 3 figures, PRL in press (changes made upon referees comments)
dc.identifierhttps://arxiv.org/abs/0806.1607
dc.identifierhttp://arxiv.org/abs/0806.1607
dc.identifierPhys. Rev. Lett. 102, 026404 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.026404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215858
dc.subjectMaterials Science
dc.subjectStrongly Correlated Electrons
dc.titleIsing magnetism and ferroelectricity in Ca$_3$CoMnO$_6$
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