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

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.

An early version of the manuscript was mistakenly submitted. Although relatively minor, the changes concern the list of authors, the main text, the references and the figure captions. 10 pages of latex, 2 figures

References in corpus (4)

• Susceptibility of the Spin 1/2 Heisenberg Antiferromagnetic Chain
• Plaquette Resonating-Valence-Bond Ground State of CaV${}_4$O${}_9$
• Spin Gap in Two-Dimensional Heisenberg Model for CaV${}_4$O${}_9$
• Spin Gap of Two-Dimensional Antiferromagnet Representing CaV${}_4$O${}_9$

Cited by in corpus (15)

• Thermodynamics of Spin S = 1/2 Antiferromagnetic Uniform and Alternating-Exchange Heisenberg Chains
• NaV_2O_5 as a quarter-filled ladder compound
• Charged Magnons in NaV2O5
• Electronic Structure and Exchange Interactions of Na${}_2$V${}_3$O${}_7$
• Magnon splitting induced by charge ordering in NaV_2O_5
• Dynamical properties of the spin-Peierls compound α'--NaV2O5
• Magnetic properties of the coupled ladder system MgV${}_2$O${}_5$
• Optical spectroscopic study of the interplay of spin and charge in NaV2O5
• Absence of effective spins 1/2 induced by nonmagnetic impurities in a class of low-dimensional magnets
• Can a frustrated spin-cluster model describe the low-temperature physics of NaV_2O_5 ?
• BaV3O8: A possible Majumdar-Ghosh system with S=1/2
• Dzyaloshinskii-Moriya interaction in NaV${}_2$O${}_5$: a microscopic study
• Magnetic properties of a spin-1/2 quadrumer chain
• Charge Ordering and Spin gap in NaV_2O_5
• Fate of Bosonic Topological Edge Modes in the Presence of Many-Body Interactions