Date of Original Version
Dynamical spin correlation functions in (q; !)-space are calculated numerically for linear quantum-mechanical Heisenberg systems containing up to ten spins with s = 1/2 and s = 1. We consider ferro- and antiferromagnets including single-site and exchange anisotropies. We compare our results with various other theoretical treatments and draw conclusions for the dynamics of infinite chains. In the case of the s = 1 planar Heisenberg ferromagnet direct comparison is made with inelastic neutron scattering cross sections of CsNiF3. The theoretical and experimental results are in good agreement.
Gerhard Müller and Hans Beck. Dynamical correlation functions for linear spin systems. J. Phys. C. 11 (1978), 483-495.
Available at: http://iopscience.iop.org/0022-3719/11/3/011