Electrically writing a magnetic heliknoton in a chiral magnet

Abstract Magnetic heliknoton, three-dimensional counterpart to the two-dimensional magnetic skyrmion, serves as a pivotal topological soliton for extending topological magnetism into three dimensions. However, its experimental realization remains elusive. Here, we report the controlled nucleation of a magnetic heliknoton in chiral magnet FeGe at zero magnetic field, achieved through nanoscale current-pulse excitation. By combining angle-dependent quantitative electron holography with micromagnetic simulations, we resolve the 3D spin texture of the heliknoton. Notably, the heliknoton exhibits current-driven collinear motion without Hall effect. Our findings establish a readily accessible experimental platform for further exploration of three-dimensional topological solitons and highlight their potential for practical applications.