Numerical and analytical study of fast precessional switching

The switching process of magnetic recording NiFe thin films is considered. First, it is illustrated through numerical micromagnetic simulations that precessional switching process can be reasonably considered a quasiuniform process, while in conventional switching process, domain nucleation and wall motion are involved in the magnetization reversal dynamics. Second, we used analytical uniform mode theory of precessional switching to predict the duration of the applied field pulse. We verified that the uniform mode theory provides reasonably good indications on the quasiuniform precessional switching dynamics.