Magnetic characterisation of strongly correlated magnetic particulate systems

In this paper we present a micromagnetic study of the high density particulate recording media. When increasing the density of magnetic recording media, magnetic clusters may develop in the system. This leads to a different magnetic behaviour of the system as the magnetic moments of the particles are correlated and switch together in potentially large regions inside the medium which act like supper-ferromagnetic domains. We present new hypotheses to explain the observed behaviour and show that this might be considered as a more general case which can be particularised for low interactions systems.