Fig. 1: Emergent monopole-antimonopole pair in the 3D structure of type-II bubbles.
From: Formation of magnetic biskyrmions mediated by an intrinsic emergent monopole-antimonopole pair
a A sketch of the 3D structure of a type-II bubble. b The contour surface with mz = 0 of a simulated bubble and diagrams of the MP-AMP pair on it. The sample is defined as 2 μm × 2 μm × 200 nm size with cells of 4 nm × 4 nm × 4 nm. The simulation is performed with a perpendicular easy axis at a perpendicular external field of 0.06 T. Other parameters are the same as in the main text. The color represents the direction of magnetizations as a conventional color wheel at the right bottom corner. The contour surface is drawn with the software Spirit35.
