Figure 3

Figure 3: Exchange field and coercive field for two NiO/NiFe coupled bilayer films as a function of temperature. The circles show H_E and H_c for a strongly exchange biased bilayer. The triangles show H_c for a bilayer with zero exchange field but elevated coercivity due to the interface coupling. H_E goes to zero at the blocking temperature, T_b, which is lower than the bulk Neel phase transition temperature, T_N (T_N = 250°C for NiO).