Figure 2: Ferrimagnetic properties of the individual films.

(a) The temperature dependence of the coercive field (filled black circles) and the remanent magnetization (open red circles) extracted from hysteresis loops measured for a 250-Å-thick DyCo₅ sample. The magnetization compensation temperature ($T_{\text{comml\_mp}}{\text{DyCo}}_5$=120 K) is clearly visible at the temperature where the coercive field diverges, whereas the reorientation temperature (T_R^DyCo5=350 K) is distinguishable as a change of the remanent magnetization. The insets show hysteresis loops below T_comp, between T_comp and T_R, and above T_R. (b) The temperature dependence of the coercive field (filled black circles) and the normalized remanent magnetization (open blue circles) for the FeGd film extracted from the hysteresis loops. In the inset are two representative hysteresis loops measured below and well above the compensation temperature (T_comp^FeGd=14 K). The external magnetic field was applied perpendicular to the sample surface.