Pulsed magnetization reversal in Ni nanowire

Pulsed magnetic field -induced magnetization reversal in Ni nanowires is investigated using micromagnetic simulation. The pulse amplitude, duration, and size of the nanowire are proven to have substantial impacts on the magnetization reversal process. Increasing pulse amplitude and duration leads to faster magnetization reversal for 10 nm-diameter nanowires. But for 40 nm-diameter nanowires with the same aspect ratio, the pulse parameters have a complicated influence on the magnetization reversal process due to the formation and propagation of magnetic domain walls. Further investigations reveal that applying a pulsed field at a certain angle from the long axis of the nanowire or raising the temperature can significantly accelerate the magnetization reversal process.