Incommensurate spin density modulation in a copper-oxide chain compound with commensurate charge order

Abstract

Neutron diffraction has been used to determine the magnetic structure of Na${}_8$Cu${}_5$O${}_{10}$, a stoichiometric compound containing chains based on edge-sharing CuO${}_4$ 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 $T_N=23$ 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.

References in corpus (6)

• On the absence of a spiral magnetic order in Li2CuO2 with one-dimensional CuO2 ribbon chains
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Cited by in corpus (1)

• Magnetism of one-dimensional Wigner lattices and its impact on charge order