| Wanjun Jiang, Xichao Zhang, Guoqiang Yu, Wei Zhang, M. Benjamin Jungfleisch, John E. Pearson, Olle Heinonen, Kang L. Wang, Yan Zhou, Axel Hoffmann, Suzanne G. E. te Velthuis
This study reports the direct observation of the skyrmion Hall effect in magnetic skyrmions at room temperature. Using a current-induced spin Hall spin torque, the researchers observed the transverse motion of skyrmions, which is analogous to the Hall effect in electronic systems. The skyrmion Hall angle was measured to be as large as 15 degrees for current densities below 10^7 A/cm². The motion of skyrmions was analyzed using a modified Thiele equation, which incorporates the topological charge and spin Hall effect. The results show that the skyrmion Hall angle increases with current density, indicating a strong dependence on the topological properties of the skyrmions.
The study also highlights the role of defects and disorder in skyrmion motion, as well as the influence of the spin Hall effect in generating and manipulating magnetic skyrmions. The researchers demonstrated that by varying the current density, skyrmions can transition from creep motion to steady flow motion. The observed motion was confirmed through micromagnetic simulations and MOKE microscopy experiments.
The findings suggest that the skyrmion Hall effect can be harnessed for applications in skyrmionics, including topological sorting and dynamic phase transitions. The study also indicates that the topological charge of skyrmions, combined with the spin Hall effect, can be used to develop novel functionalities. The results provide important insights into the dynamics of magnetic skyrmions and their potential for future technological applications.This study reports the direct observation of the skyrmion Hall effect in magnetic skyrmions at room temperature. Using a current-induced spin Hall spin torque, the researchers observed the transverse motion of skyrmions, which is analogous to the Hall effect in electronic systems. The skyrmion Hall angle was measured to be as large as 15 degrees for current densities below 10^7 A/cm². The motion of skyrmions was analyzed using a modified Thiele equation, which incorporates the topological charge and spin Hall effect. The results show that the skyrmion Hall angle increases with current density, indicating a strong dependence on the topological properties of the skyrmions.
The study also highlights the role of defects and disorder in skyrmion motion, as well as the influence of the spin Hall effect in generating and manipulating magnetic skyrmions. The researchers demonstrated that by varying the current density, skyrmions can transition from creep motion to steady flow motion. The observed motion was confirmed through micromagnetic simulations and MOKE microscopy experiments.
The findings suggest that the skyrmion Hall effect can be harnessed for applications in skyrmionics, including topological sorting and dynamic phase transitions. The study also indicates that the topological charge of skyrmions, combined with the spin Hall effect, can be used to develop novel functionalities. The results provide important insights into the dynamics of magnetic skyrmions and their potential for future technological applications.