Skyrmion Dynamics in the Presence of Deformation
Zehan Chen, Xichao Zhang, Yan Zhou, Qiming Shao
Abstract
The nonlinear dynamics of current-driven skyrmions are essential for designing skyrmion-based spintronic devices. However, Thiele's approach uses a rigid-body assumption that is not suitable here, as skyrmions may change shape at high speeds. This study extends Thiele's equation by including the radial and tangential force components. With this approach, one may depict the inner structure of a current-driven skyrmion and propose a way to suppress deformation with an in-plane magnetic field. This extended analytic formulation may help to describe the nonlinear dynamics of other spin textures as well, and to promote applications based on such dynamics.
Topics & Concepts
SkyrmionDynamics (music)Nonlinear systemCurrent (fluid)PhysicsDeformation (meteorology)SpintronicsClassical mechanicsPlane (geometry)Field (mathematics)Spin (aerodynamics)Magnetic fieldMathematicsGeometryCondensed matter physicsAcousticsQuantum mechanicsFerromagnetismThermodynamicsMeteorologyPure mathematicsMagnetic properties of thin filmsMagnetic Properties and ApplicationsCharacterization and Applications of Magnetic Nanoparticles