  Magnetic skyrmions are localized particle-like nontrivial swirls that are
promising in building high-performance topological spintronic devices. The
read-out functions in skyrmionic devices require the translation of magnetic
skyrmions to electrical signals. Here, we report combined real-space magnetic
imaging and anisotropic magnetoresistance studies on dipolar skyrmions. A
single skyrmion chain and single skyrmion are observed using Lorentz
transmission electron microscopy imaging. Meanwhile, the field, helicity, and
skyrmion count dependence of anisotropic magnetoresistance of the Fe3Sn2
nanostructures are obtained simultaneously. Our results demonstrate that the
anisotropic magnetoresistance of skyrmions is independent of the helicity and
proportional to the skyrmion count. Our work could promote read-out operations
in skyrmion-based spintronic devices.
