Figure 5

(a, c) Close-up image of one representative square with a = 25 µm illustrating the magnetization reversal for 2 → 3 and 1 → 2 transitions after IB with dose D* and D**, respectively. (b, d) Sketch of the effective magnetization, and the magnetization of the Co and Tb subsystems (with the color convention of Fig. 3) in cross sectional view. The stray fields from magnetic domain structure are schematically presented in (b) and (d). Green arrows show the direction of DWs movement.