Fig. 1
a Schematic structure of the device studied in this work. The other layers are not shown for clarity. b Typical results of the time-dependent mz (perpendicular-component of the unit magnetization). Case A: σ = 1 × 10−3 J/m2, D1 = D2 = 0 (red for FL1, blue for FL2). Case B: σ = 1 × 10−3 J/m2, D1 = 1 mJ/m2, D2 =−1 mJ/m2 (orange for FL1, cyan for FL2). Case C: σ = 1 × 10−4 J/m2, D1 = D2 = 0 (green for FL1, black for FL2)