Abstract:
The energy of thick ferromagnetic films up to 10000 layers has been explained in
this report using classical Heisenberg Hamiltonian with second order perturbation.
Especially the effect of applied magnetic field and stress on energy of sc(001)
ferromagnetic thick films has been investigated. Under the influence of perpendicular
magnetic field given by
out H
= 6, the sc(001) ferromagnetic film with 10000 layers can
be easily oriented in 0.5 radians direction. The easy direction of sc(001) ferromagnetic film
with 10000 layers was found to be 0.6 radians when the in-plane magnetic field of
in H
= 4.2 is applied. Because the easy axis oriented magnetic films are useful in magnetic
memory devices and monolithic microwave integrated circuits (MMIC), the determination
of easy direction is important. If the stress given by
s K
= 2.6 is applied in perpendicular
direction to the film plane, the film can be easily oriented in direction of 3 radians. Energy
under influence of perpendicular magnetic field is larger than the energy under the
influence of in-plane magnetic field. After introducing the second order perturbation to the
Heisenberg Hamiltonian, even some small variations of energy could be investigated as
indicated in the graphs in this manuscript.
