Thermomagnetic writing on thin MnBi films

The validity of the assumptions made to explain the writing process in MnBi thin films is discussed, with reference to experimental results. We show that the magnetization behavior versus temperature can be explained by a second order magnetic transition. The comparison between theoretical predictions and experimental results corroborates this assumption and indicates that both nonsaturation of the written bit and domain wall motion must be taken into account in the dynamical description of the writing processes.