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The dynamics of magnetic skyrmion driven by spin-polarized current istheoretically studied in the chiral ferromagnetic film with spatially modulatedDzyaloshinskii-Moriya interaction. Three cases including linear, sinusoidal,and periodic rectangular modulations have been considered, where the increase,decrease, and the periodic modification of the size and velocity of theskyrmion have been observed in the microscopic simulations. These phenomena arewell explained by the Thiele equation, where an effective force on the skyrmionis induced by the inhomogeneous Dzyaloshinskii-Moriya interaction. The resultshere suggest that the dynamics of skyrmion can be manipulated by artificiallytuning the Dzyaloshinskii-Moriya interaction in chiral ferromagnetic film withmaterial engineering methods, which will be useful to design skyrmion-basedspintronics devices.

Current-driven Dynamics of Magnetic Skyrmion in Chiral Ferromagnetic Film with Spatially Modulated Dzyaloshinskii-Moriya Interaction