Author:

Abstract

The energy of perfectly oriented thick ferromagnetic films at different applied magnetic field and stress was studied using classical model of Heisenberg Hamiltonian. For the values of parameters used in this report, the energy required to orient the film with 1000 layers in 41.4° or 57.6° directions becomes minimum at applied magnetic fields of H_out/ω = 4.8 or H_in/ω = 4.8, respectively. The film can be easily oriented in 172° direction by applying the external stress K_s/ω = 3.6 perpendicular to the film plane, for the values of parameters used in this report. These final results mainly depend on the values of other parameters used for calculations. The energy becomes minimum and maximum at almost the same values of oriented angle (θ), in plane magnetic field, out of plane magnetic field and stress for both sc(001) and bcc(001 lattice types. But the values of energies corresponding to maxima and minima are slightly different for the sc(001) and bcc(001) lattices.

Keywords: Magnetic thin films; ferromagnetism; Heisenberg Hamiltonian; stress induced anisotropy and spin

DOI: 10.4038/josuk.v4i0.2692

J Sci.Univ.Kelaniya 4 (2008): 1-10

Keywords: Magnetic thin films, ferromagnetism, Heisenberg Hamiltonian, stress induced anisotropy and spin