Abstract
In this work, the finite elements method is used to simulate, by micromagnetic modeling, the motion of a magnetic domain wall under the action of an oscillating external field. In the micromagnetic magnetization dynamics, a nonzero inertia tensor is used, resulting in a partial differential equation also containing the second time derivative of the magnetization. The model is investigated in all of its parameters, and it is validated by solving the NIST problem μMag#4. All the simulations were carried out on spherical particles of an uniaxial magnetocrystalline anisotropy, and they started with the nucleation and the growth of the magnetic domains. Under the influence of an oscillating external field, the susceptibility spectra are calculated for different magnetic parameters. For low damping values in the susceptibility spectra, beyond the contribution of the coherent oscillating domain wall, multiple resonances are also found.
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