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PHYS 8990 Topic

Spin Dynamics Simulations of Magnetic Systems

David P. Landau

The study of elementary excitations and “critical slowing” (long time scales) in simple magnetic lattice models forms an exciting topic of investigation.  We use a variety of modern time integration techniques to follow the microscopic equations of motion of large numbers of interacting magnetic moments.  The resultant data allow us to compute time-displaced, space-displaced correlation functions from which we extract the dynamic structure factor.  Results from the simulations can be compared directly with data from inelastic neutron scattering experiments and can also be used to test theoretical predictions.

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