Transition Jitter in Heat Assisted Magnetic Recording by Micromagnetic Simulation

摘要

In this paper we apply an extended Landau-Lifschitz equation, as introducedby Ba\v{n}as et al. for the simulation of heat-assisted magnetic recording.This equation has similarities with the Landau-Lifshitz-Bloch equation. TheBa\v{n}as equation is supposed to be used in a continuum setting with sub-graindiscretization by the finite-element method. Thus, local geometric features andnonuniform magnetic states during switching are taken into account. Weimplement the Ba\v{n}as model and test its capability for predicting therecording performance in a realistic recording scenario. By performingrecording simulations on 100 media slabs with randomized granular structure andconsecutive read back calculation, the write position shift and transitionjitter for bit lengths of 10nm, 12nm, and 20nm are calculated.