Figure 1
Analytical model and principal compensation mechanism in AFM-coupled bilayers. (a) Schematic drawing of an FM1/FM2 AFM-coupled bilayer structure, and magnetization M 1 (M 2) and magnetic anisotropy field H K1 (H K2) directions of FM1 (FM2). (b) Schematic diagram depicting different scenarios of magnetic moment (m) versus temperature (T). The AFM-coupled ferromagnetic films FM1 and FM2 have Curie temperature T c1 and T c2 respectively. When m of FM1 is greater than that of FM2 (solid line), there is no intersection point between the two m-T curves. At a smaller m of FM1, the m-T curve of FM1 (dash line) will cross the m-T curve of FM2 at a compensation temperature of T comp. (c) The two scenarios in (b) result in two distinct M net - T curves at temperature below T comp: One has decreasing m with increasing T, and the other is opposite.
