  Antiferromagnetic (AFM) skyrmions have emerged as a highly promising avenue
in the realm of spintronics, particularly for the development of advanced
racetrack memory devices. A distinguishing feature of AFM skyrmions is their
zero topological charge and hence anticipated zero skyrmion Hall effect (SkHE).
Here, we unveil that the latter is surprisingly finite under the influence of
spin-transfer torque, depending on the direction of the injected current
impinging on intrinsic AFM skyrmions emerging in CrPdFe trilayer on Ir(111)
surface. Hinging on first-principles combined with atomistic spin dynamics
simulations, we identify the origin of the SkHE and uncover that FM skyrmions
in the underlying Fe layer act as effective traps for AFM skyrmions, confining
them and reducing their velocity. These findings hold significant promise for
spintronic applications, the design of multi-purpose skyrmion-tracks, advancing
our understanding of AFM-FM skyrmion interactions and hybrid soliton dynamics
in heterostructures.
