  Heisenberg Hamiltonian was employed to describe the variation of energy of
thick ferromagnetic films with second and fourth order anisotropies. At angle
of 1.36 degrees and anisotropies of 1.25, energy is minimum for thick film of
sc(001) with 1000 layers. Energy becomes minimum at angle of 1.18 degrees and
fourth order anisotropy of 1.15 for thick film of bcc(001) with the same
thickness. According to these simulations, these lattices can be easily
oriented in some certain directions under the influence of some particular
values of anisotropies. Energy varies with second and fourth order anisotropies
in similar passion for both types of lattices. The energy gradually decreases
with second and fourth order anisotropy for both types of lattices in the range
described here.
