Abstract
We simulate a single 180°-Bloch wall motion driven by an external magnetic field through random impurities. The dynamics of the wall is described in terms of a Langevin-type stochastic equation of motion for the wall position, including effects of wall rigidity, quenched random impurities, external field and stray field as well as the temperature. Analyzing the temporal fluctuations of the spatially averaged wall velocity, we study the magnetization noise properties as a function of the external field. It is found that with increasing the external field the form of the noise power spectrum changes from the 1/ f-type just above the coercive field to the Lorentzian-like for large (but not huge) external fields.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
