Computational Modelling Group

Southampton's Nmag simulation software supports leading magnetisation dynamics study

Southampton's Nmag open source software plays key role in study that captures magnetisation dynamics in magnetic memory in super slow-motion.

The results have been described in Dr Wessel's study Time-resolved imaging of domain pattern destruction and recovery via nonequilibrium magnetization states published in Physical Review B.

Simulation results

Magnetisation in ferromagnetic materials wants to align uniformly but at the same time connect north and south poles. The vortex arrangement show in the image above is the lowest energy configuration to achieve this for the particular geometry: within each triangular domain, the magnetisation is uniform, and all north and south poles are connected.

Prof Fangohr, who led the Nmag development, comments that he is particularly pleased that the user friendly interface and documentation that his team developed, allows Nmag to be used widely in the experimental community that has no special training in computer simulation use or development.