Fig. 4: Micromagnetic modeling of domain morphology and anisotropic magnetoresistance.
From: Transport properties of dipole skyrmions in amorphous Fe/Gd multilayers
a Field-dependent calculated anisotropic magnetoresistance (AMR) obtained from processing equilibrium states stabilized on a 10 μm × 10 μm × 80 nm slab with 10 nm tetrahedra, and magnetic properties: saturation magnetization, MS = 400 emu/cm3, uniaxial anisotropy, KU = 4 × 105 erg/cm3, and exchange length, Aex = 5 × 10−7 erg/cm. Overlaid on (a) are the respective field-dependent magnetic phases (disordered stripes, stripe-skyrmion transition, skyrmion lattice, disordered skyrmion, uniform magnetization). b–k Equilibrium states, at different perpendicular fields, illustrate the top-side view of the magnetization along the z-axis (mz) at the top surface of the slab (z = 40 nm). The perpendicular magnetization (mz) is represented by regions in red (+mz) and blue (−mz), while the in-plane magnetization (mx, mz) is represented by white regions. Each image depicts a 2 × 2 μm field of view near the center of the 10 × 10 μm total area. The colorbar details the (mz) magnetization polarity detailed in the equilibrium states.
