Temperature distribution effects on the magnetization switching in FePt single domain particles

In this paper heat assisted magnetic recording (HAMR) is introduced. FePt single domain particles are heated by laser, and has a certain distribution, for example, a Gaussian distribution in xy plane. Monte Carlo simulation is performed on the effect of the temperature distribution in particles on the magnetisation switching. Two nucleation modes in the simulation, indicating the important effect of temperature distribution on the magnetization reversal process is observed. An inverse proportion relationship between the lifetime tau and the parameter sigma in Gaussian distribution of the temperature is also determined numerically.