The long time scale micromagnetics package bases on a Monte Carlo approach to calculate the coercivity as function of temperature and measurement time Hc(t,T). The Monte Carlo approach uses energy barriers which are calculated with the nudged elastic band method. The long time scale micromagnetics package can be used for example to calculate the dynamic coercivity of multilayer recording media where the thermal activated reversal mode occurs via a complicated domain wall propagation process.

Another important application of this package is to calculate the thermal noise in reader elements. The uniqueness of this package is that the magnetic noise can be calculated on a timescale of seconds to years.

The possibilities of FEMME in order to take thermal effects into account are unique and highly regarded by industry and academia. Whereas, the basic micromagnetic packages solves the micromagnetic equations at zero temperature, finite temperature is an important fact in several applications. For example thermal fluctuations decrease the coercive field of typical recording films by more than a factor of two. The long time stability of recorded information requires a detailed understanding of energy barriers separating magnetic stable states. Depending if one is interested in long term stability or dynamic processes at finite temperature different packages are available.

With the energy barriers package saddle points between the initial state and a final state can be calculated. The energy barrier calculation bases on the nudged elastic band method which was found to be a very reliable method for the calculation of the minimum energy path between two complicated magnetic states. 

With the thermal noise package finite temperature can be taken into account. This is done by adding a stochastic term to the Landau Lifshitz Gilbert equation. A coarse graining approach is applied in order to guarantee accurate results for any computational cell sizes.