fig3

Figure 3. Phase diagram of different topological states with respect to PMA constant K_b and perpendicular magnetic field H_z. The metastable states are obtained by relaxing the magnetic nanostripe with an initial hopfion state at the center. The midplane (z = 50 nm) cross-sections of m are presented. The size of the nanostripe is 900 × 600 × 100 nm³.