Abstract
A finite element read/write simulation was performed by solving the Poisson equation for a 2D model of antiferromagnetically coupled (AFC) media and a thin-film-head system. AFC media are composed of two recording layers and a thin intervening Ru layer. From the simulation of an isolated transition, it was found that (1) an extra transition appears in the underlayer because of the reversal of the field in writing the main transition, (2) the extra transition disappears at around t = 10-2 [s]. Furthemore, from simulation at 423 kFRPI, it was found that (3) the reverse field plays an important role in the recording process by creating an antiparallel magnetization alignment in each bit. Finally, it is shown that (4) the thermal stability of the AFC medium is better than that of a conventional single-layer medium by about two orders of magnitude and that of a keepered medium by an order of magnitude in time scale.
