Micromagnetic study of the correlation between head field gradient and jitter in perpendicular recording

Transition position jitter is the dominant noise source in advanced magnetic recording systems. It has been demonstrated that the jitter is related to the transition parameter and cross-track correlation length of the written transition. Here, micromagnetic simulations were performed to analyze the correlation between the head field gradient and the jitter and to explore which head field gradient can be used for the jitter correlation. Lastly, a micromagnetic read/write model consisting of a pseudo-Voronoi medium, a finite element model (FEM) head field, and a reciprocity playback is used to simulate the recording system.