Theory of antiferromagnetically coupled magnetic recording media

A theoretical overview of antiferromagnetically coupled media (AFC media) i s presented for the case where the AFC medium has two ferromagnetic films t hat are coupled antiferromagnetically via a thin polarization layer. Attent ion is focused on AFC-slave media where the top layer governs the remanent magnetization. It is demonstrated that such media behave like an effectivel y thin single layer magnetic recording medium in terms of improved pulse wi dth, while the magnetic stability of AFC grains is governed by the thicker top layer.