Modelling of interaction effects in fine particle systems

A model of magnetisation processes in interacting fine particle systems has been developed. This is based on a Monte Carlo approach and is capable of simulations of temperature and time dependent magnetic properties, A separate model has been developed to predict the microstructure of fine particle systems such as those obtained by the solidification of magnetic fluids. These simulations generate realistic microstructures, which are used as the central cell in the Monte Carlo calculations of magnetic properties. Initial calculations of hysteresis loops and remanence curves have been carried out which demonstrate the importance of the physical microstructure on the interaction problem.