Figure 2: Micromagnetic simulations of magnetization reversal.
From: Programmability of Co-antidot lattices of optimized geometry

Beginning with the ground-state distribution shown in Fig. 1b, reversal was simulated for magnetic field applied along the (a) [10] direction resulting in the switched ground-state in (c). Similarly, reversal under a magnetic field applied along the [11] direction (d) switches the antidot lattices to the ground state shown in (f). Dotted ellipses show the regions undergoing the reversal process. Distribution of the perpendicular magnetization component during reversal are shown in (b,e) for magnetic field applied respectively along the [10] and [11] directions. Simulations were performed on a 10 × 10 lattice and the results shown here are from the same 4 × 4 corner of the lattice. The applied magnetic fields are 40 mT in (a,b) and mT in (d,e). The coloured double-cone of (b) follows the same scheme as the red-green-blue-red colour wheel of (a), except that it indicates out-of-plane angular position.