Abstract
Magnetic properties of the triclinic copper vanadate $\ensuremath{\alpha}\ensuremath{-}{\mathrm{CuV}}_{2}{\mathrm{O}}_{6}$ with linear chains of edge-sharing ${\mathrm{CuO}}_{6}$ octahedra were studied by magnetic susceptibility and electron-spin-resonance measurements. The broad maximum of a magnetic susceptibility at ${T}_{M}=44\mathrm{K}$ corresponding to the intrachain exchange interaction $J=34\mathrm{K}$ indicates one-dimensional short-range magnetic ordering within the chains. Three-dimensional long-range antiferromagnetic ordering takes place at ${T}_{N}=24\mathrm{K},$ suggesting a rather large value for the interchain exchange interaction ${J}_{\ensuremath{\perp}}\ensuremath{\sim}16.5\mathrm{K}.$ The energy gap found in the antiferromagnetic resonance spectrum 76 GHz agrees with the spin-flop magnetic-field value of about 2.7 T.
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