Magnetic Structure and Interactions in the Quasi-1D Antiferromagnet CaV$_2$O$_4$

Details Magnetic Structure and Interactions in the Quasi-1D Antiferromagnet CaV$_2$O$_4$ Magnetic Structure and Interactions in the Quasi-1D Antiferromagnet CaV$_2$O$_4$

2008-12-09

arxiv.org/abs/0812.1808v2

Phys. Rev. B 79, 180409(R) (2009); 4 pages

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.79.180409

CaV$_2$O$_4$ is a spin-1 antiferromagnet, where the magnetic vanadium ions are arranged on quasi-one-dimensional (1D) zig-zag chains with potentially frustrated antiferromagnetic exchange interactions. High temperature susceptibility and single-crystal neutron diffraction measurements are used to deduce the non-collinear magnetic structure, dominant exchange interactions and orbital configurations. The results suggest that at high temperatures CaV$_2$O$_4$ behaves as a Haldane chain, but at low temperatures, orbital ordering lifts the frustration and it becomes a spin-1 ladder.

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