  Zener ordering is a phenomenon that octahedral interstitial atoms such as
carbon occupy the same sublattice inside bcc matrix such as iron. The original
formulation relies on a mean field theory, which is still most in use today. We
employ multiple methods, such as Molecular Dynamics, Metropolis Monte Carlo,
Mean Field Theory with chemical interactions and finite temperature effects to
show that the Zener ordering for iron carbon systems is governed by local
chemical interactions and finite temperature effects and less of mean field
nature as described originally by Zener.
