Fig. 4
a, b Switching time as a function of Deq. Each Deq is obtained with two pairs of different {D1, D2} values according to Deq = (t1D1 + t2D2)/(t1 + t2). Red curve: D1 is varied meanwhile D2 is fixed to 1 mJ/m2. Blue curve: D1 and D2 are always set to the same value. Here σ = 1 × 10−2J/m2. In a, the other parameters are configured as Table 1. In b, Ku1 = Ku2 = 0.7 mJ/m3 for an ideal case. c, d Typical results of time-dependent mz corresponding to a and b, respectively