THE ANTIFERROMAGNETIC SPIN-1 2-XXZ MODEL ON RINGS WITH AN ODD NUMBER OF SITES/

The ground-state energies of the antiferromagnetic XXZ model at a give n spin are determined on chains with an odd number N of sites. Analyti cal and numerical solutions of the Bethe ansatz equations are compared for the N-even and N-odd case. The scaling properties of the ground-s tate energies enable the determination of the zero-temperature suscept ibility. For the isotropic case, we analyse the logarithmic terms in t he low-field limit.