Abstract
A read/write simulation based on the Poisson equation by a finite element method was performed on antiferromagnetically coupled (AFC) magnetic media composed of two laminated recording layers and a thin intervening Ru layer, and a thin-film head system. To estimate the thermal stability of the AFC media, a new medium model that introduces interlayer exchange coupling as proposed. This model explains well the ovserved minor loop shifts to the first quadrant in M-H loops due to the interlayer exchange coupling. However, the recorded magnetizations calculated by using this model are found to be in antiparallel magnetization configurations that are independent of the interlayer exchange coupling, and the thermal stability of the AFC media is found to be much improved in comparison with that of the conventional medium. This suggests that within the parameters used in the present simulation, the thermal stability of the AFC media is mainly enhanced by the magnetostatic interlayer coupling.
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