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The total magnetic energy of Lithium ferrite thin films was determined usingthe classical Heisenberg Hamiltonian. The short range magnetic dipoleinteractions between spins within one unit cell and the interactions betweenspins in two adjacent unit cells have been determined in order to find thetotal magnetic energy of lithium ferrite films. Only the spin pairs withseparation less than cell constant have been taken into account to calculatedipole interaction and spin exchange interaction. Theoretically several easyand hard directions of lithium ferrite film were found for one set of energyparameters included in our modified Heisenberg Hamiltonian. The dependence oftotal magnetic energy of a lithium ferrite film on number of unit cells, spinexchange interaction, dipole interaction, second order magnetic anisotropy,fourth order magnetic anisotropy, internal applied magnetic field and stressinduced magnetic anisotropy has been explained in this manuscript.

Magnetic Dipole Interaction and Total Magnetic Energy of Lithium Ferrire Thin Films