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Magnetic properties of NaV2O5, a one-dimensional spin 1/2 antiferromagnet with finite chains

Frederic Mila·Patrice Millet·Jacques Bonvoisin
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Abstract

We have performed measurements of the magnetic susceptibility of NaV$_2$O$_5$ between 2 and 400 K. The high temperature part is typical of spin 1/2 chains with a nearest--neighbour antiferromagnetic exchange integral $J$ of 529 K. We develop a model for the susceptibility of a system with finite chains to account for the low temperature part of the data, which cannot be fitted by a standard Curie-Weiss term. These results suggest that the next nearest--neighbour exchange integral $J_2$ in CaV$_4$O$_9$ should be of the order of 500 K because, like $J$ in NaV$_2$O$_5$, it corresponds to corner sharing VO$_5$ square pyramids.

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Frederic Mila, Patrice Millet, Jacques Bonvoisin. 1996-05-06. Magnetic properties of NaV2O5, a one-dimensional spin 1/2 antiferromagnet with finite chains. https://doi.org/10.1103/physrevb.54.11925

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