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Magnetic Structure and Interactions in the Quasi-1D Antiferromagnet CaV₂O₄

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arxiv 0812.1808 v2 pith:B7QNYW7Y submitted 2008-12-09 cond-mat.str-el

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

Oliver Pieper , Bella Lake , Aziz Daoud-Aladine , Manfred Reehuis , Karel Prokes , Bastian Klemke , Klaus Kiefer , Jiaqiang Yan
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Asad Niazi David C. Johnston Andreas Honecker
This is my paper
classification cond-mat.str-el
keywords interactionsmagneticantiferromagnetexchangehighorbitalspin-1structure
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abstract

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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