biostudies-literatureZhu HNational Natural Science Foundation of ChinaNational Key Research and Development Program of China312https://www.ebi.ac.uk/biostudies/studies/S-EPMC10857043biostudies-literatureUnknown14(3)Recently, it has been reported that the skyrmion Hall effect can be suppressed in an elliptical skyrmion-based device. Given that defects are unavoidable in materials, it is necessary and important to investigate the dynamics of an elliptical skyrmion in a defective racetrack device. In this work, the current-driven dynamics of an elliptical skyrmion in a defective racetrack device are systematically studied using micromagnetic simulations. The system energy analysis reveals that the magnetic parameters of the circular defect play critical roles in determining the type (repulsive or attractive) and the magnitude of the force on the elliptical skyrmion. The simulated trajectories show that the primary motion modes of the elliptical skyrmion in the defective racetrack can be divided into fouNanomaterials (Basel, Switzerland)Dynamics of Elliptical Magnetic Skyrmion in Defective Racetrack.PMC108570432022YFA140510052172272Feng YZhang XZhu HXiang GfalseDynamics of Elliptical Magnetic Skyrmion in Defective Racetrack.Recently, it has been reported that the skyrmion Hall effect can be suppressed in an elliptical skyrmion-based device. Given that defects are unavoidable in materials, it is necessary and important to investigate the dynamics of an elliptical skyrmion in a defective racetrack device. In this work, the current-driven dynamics of an elliptical skyrmion in a defective racetrack device are systematically studied using micromagnetic simulations. The system energy analysis reveals that the magnetic parameters of the circular defect play critical roles in determining the type (repulsive or attractive) and the magnitude of the force on the elliptical skyrmion. The simulated trajectories show that the primary motion modes of the elliptical skyrmion in the defective racetrack can be divided into fou2024-01-01T00:00:00Z2024 Feb2025-04-05T00:03:17.136Z2025-04-05T00:03:17.136ZS-EPMC108570433833458310.3390/nano14030312