Physical Review Letters · 2008 · 13 citations · 12 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMagnetic MaterialsPhysical ChemistryExchange InteractionsMagnetic OxidesMagnetic Properties Of SolidsMagnetism In SolidsMagnetism Of Inorganic CompoundsNeutron DiffractionCollinear AntiferromagnetismExchange CouplingFrustrated Exchange InteractionsInterchain InteractionsMagnetic Exchange InteractionsMagnetic Structure DeterminationNeutron SpectroscopySpin Ordering
Neutron diffraction has been used to determine the magnetic structure of Na8Cu5O10, a stoichiometric compound containing chains based on edge-sharing CuO4 plaquettes. The chains are doped with 2/5 hole per Cu site and exhibit long-range commensurate charge order with an onset well above room temperature. Below TN=23 K, the neutron data indicate long-range collinear magnetic order with a spin-density modulation whose propagation vector is commensurate along, and incommensurate perpendicular to, the chains. Competing interchain exchange interactions are discussed as a possible origin of the incommensurate magnetic order.
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