Dimension analysis of attractor of chaotic domain-wall motion in CoZrMo/SiO2 multi-layered film

The magnetic domain-wall motion of CoZrMo/SiO2 multi-layered thin film core was studied by the dimension analysis of the attractor. The power spectrum of domain-wall motion had the fundamental oscillation, many harmonics and the continuous component of frequency. The reconstructed attractor was obtained from the time series of voltage that was inverse Fourier transformation of the power spectrum excluded the harmonics from 100 to 900 kHz. The correlation dimension D was found to be 8.83 by the dimension analysis of the attractor. Therefore, the attractor has the fractal structure and the strong possibility of chaotic domain-wall motion was shown