Transition Jitter in Heat-Assisted Magnetic Recording by Micromagnetic Simulation

In this paper, we apply an extended Landau-Lifshitz equation, as introduced by Baňas et al. for the simulation of heat-assisted magnetic recording. This equation has similarities with the Landau-Lifshitz-Bloch equation. The Baňas equation is supposed to be used in a continuum setting with sub-grain discretization by the finite-element method. Thus, local geometric features and nonuniform magnetic states during switching are taken into account. We implement the Baňas model and test its capability for predicting the recording performance in a realistic recording scenario. By performing recording simulations on 100 media slabs with randomized granular structure and consecutive readback calculation, the write position shift and transition jitter for bit lengths of 10, 12, and 20 nm are calculated.