  In this work we compare previously measured energy barriers over the course
of temperature with the results of simulations of the behaviour of the energy
barriers. For the measurements the temperature dependent magnetorelaxation
method (TMRX) was used. For the simulations of the energy barrier distribution
we have used the real particles properties such as anisotropy and core size
volume of the fractions of two magnetically fractionated ferrofluids. There is
a good agreement between the simulated behaviour and the experimental obtained
results. The influence of the particle volume concentration and agglomeration
on the energy barrier distribution has been investigated. Finally the
simulations confirm a previously published explanation for an experimentally
obtained relaxation effect.
