Insulator to semiconductor transition and magnetic properties of the one-dimensional S = 1/2 system In_2VO_5

Abstract

We report structural, magnetization, electrical resistivity and nuclear- and electron spin resonance data of the complex transition metal oxide In_2VO_5 in which structurally well-defined V-O chains are realized. An itinerant character of the vanadium d-electrons and ferromagnetic correlations, revealed at high temperatures, are contrasted with the insulating behavior and predominantly antiferromagnetic exchange between the localized V^{4+} S = 1/2-magnetic moments which develop below a certain characteristic temperature T* ~ 120 K. Eventually the compound exhibits short-range magnetic order at $T_SRO ~ 20 K. We attribute this crossover occurring around T* to the unusual anisotropic thermal contraction of the lattice which changes significantly the overlap integrals and the character of magnetic intra- and interchain interactions.

arXiv commentsubmitted to Phys. Rev. B

References in corpus (5)

• Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
• Experiments on Ladders Reveal a Complex Interplay between a Spin-Gapped Normal State and Superconductivity
• Tuning the magnetic ground state of a novel tetranuclear Nickel(II) molecular complex by high magnetic fields
• Critical Properties of One-Dimensional Electron Systems with $1/r^{\alpha }$-type Long-Range Interactions
• Electronic structure of the zigzag spin-chain compound In${}_2$VO${}_5$

Cited by in corpus (3)

• Spin Dynamics in $S=1/2$ Chains with Next-Nearest-Neighbor Exchange Interactions
• Magnetic and thermal properties of the S = 1/2 zig-zag spin-chain compound In2VO5
• Triplet Dimerization Crossover Driven by Magnetic Frustration in In2VO5