xy-slices of the experimentally measured 3D magnetic field at 4 nm showing the surface skyrmions. The colors display the orientation of the experimentally measured 3D vector field as mapped by the 3D color map outlined by the black rectangle in between (d,f) whereas the arrows length represents the magnitude of the in-plane projection of the 3D magnetic field. The spin texture is outlined by a solid dark grey rectangle. The scalebar is 100 nm.
