Oxygen Moment Formation and Canting in Li2CuO2

Abstract

The possibilities of oxygen moment formation and canting in the quasi-1D cuprate Li2CuO2 are investigated using single crystal neutron diffraction at 2 K. The observed magnetic intensities could not be explained without the inclusion of a large ordered oxygen moment of 0.11(1) Bohr magnetons. Least-squares refinement of the magnetic structure of Li2CuO2 in combination with a spin-density Patterson analysis shows that the magnetization densities of the Cu and O atoms are highly aspherical, forming quasi-1D ribbons of localised Cu and O moments. Magnetic structure refinements and low-field magnetization measurements both suggest that the magnetic structure of Li2CuO2 at 2 K may be canted. A possible model for the canted configuration is proposed.

arXiv comment10 pages, 8 figures (screen resolution)

References in corpus (3)

• Electronic States and Magnetic Propertis of Edge-sharing Cu-O Chains
• Extended Moment Formation and Second Neighbor Coupling in Li${}_2$CuO${}_2$
• The magnetic structure of Li2CuO2: from ab initio calculations to macroscopic simulations

Cited by in corpus (17)

• Reply to Comment on "Competition between helimagnetism and commensurate quantum spin correlations in LiCu2O2"
• Helicoidal magnetic order in a clean copper oxide spin chain compound
• On the absence of a spiral magnetic order in Li2CuO2 with one-dimensional CuO2 ribbon chains
• Highly Dispersive Spin Excitations in the Chain Cuprate Li2CuO2
• Multiferroicity in the spin-1/2 quantum matter of LiCu2O2
• Temperature dependent optical conductivity of undoped cuprates with weak exchange
• Most spin-1/2 transition-metal ions do have single ion anisotropy
• The strength of frustration and quantum fluctuations in LiVCuO4
• Dzyaloshinskii-Moriya coupling in 3d insulators
• Electronic structure of Mu-complex donor state in rutile TiO${}_2$
• Electronic structure of shallow donor state associated with muonium in rutile TiO${}_2$
• Dzyaloshinsky-Moriya antisymmetric exchange coupling in cuprates: Oxygen effects
• Evidence for ordered magnetic moments at oxygen sites in antiferromagnetic Sr${}_2$IrO${}_4$ and Sr${}_3$Ir${}_2$O${}_7$
• Oxygen magnetic polarization, nodes in spin density, and zigzag spin order in oxides
• Exchange integrals and magnetization distribution in BaCu2X2O7 (X=Ge,Si)
• Refined Spin Wave Model and Multi-magnon Bound States in $L{i}_{2}Cu{O}_2$
• Self-organised magnon condensation in quasi-1D edge-shared cuprates without external fields