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Spin waves in vanadium sesquioxide V 2 O 3

1981; American Physical Society; Volume: 23; Issue: 7 Linguagem: Inglês

10.1103/physrevb.23.3533

1095-3795

R. E. Word, S. A. Werner, W. B. Yelon, J.M. Honig, S. A. Shivashankar,

Magneto-Optical Properties and Applications

We have carried out inelastic neutron scattering measurements of the spin waves propagating along the [$00l$] trigonal axis and along the [$\mathrm{hh}0$] axis in the antiferromagnetic phase of ${\mathrm{V}}_{2}$${\mathrm{O}}_{3}$. We find an energy gap in the spin-wave spectrum at the zone center of 4.75 meV. We obtain exchange parameters and the anisotropy energy from these data using a nearest-neighbor and next-nearest-neighbor Heisenberg Hamiltonian model.