Abstract
The study of magnetic domain-wall motion is important in the fields of both power-magnetic micro-cores and magnetic recording applications. The nonlinear differential equation of the Bloch wall motion is obtained by modification of the Landau-Lifshitz-Gilbert equation. The terms of the non-linear force of restitution and eddy current damping are added, and the equation is solved by using the fourth Runge-Kutta method. The tendency for the amplitude of magnetic domain-wall motion to decrease with an increase in the frequency of the CoZrMo/SiO2 multilayered core is reproduced well by computer simulation. The irregular oscillation of the domain wall is found to be chaotic because a fractal structure is observed in the Poincaré map. This result leads to a method for investigating energy loss and irregular phenomena (error or noise in magnetic recording systems) arising from magnetic domain-wall oscillation.
