Periodic magnetization structures generated by transverse spin-current in magnetic nanowires

Abstract

Magnetization behavior of long nanowires with square cross-section under influence of strong perpendicular spin-polarized current is studied theoretically. The study is based on Landau-Lifshitz-Slonczewski phenomenology. In the no current case the wire is magnetized uniformly along its axis. For small currents the wire magnetization remains uniform but it inclines with respect to the wire axis within the plane perpendicular to the current direction. With the current increasing the inclination angle increases up to the maximum value $\pi /4$. Further current increase leads either to saturation or to stable periodic multidomain structure depending on the wire thickness. For thick wires a hysteresis is observed in the saturation process under the action of current. All critical parameters of the current induced magnetization behavior are determined theoretically. The study is carried out both analytically and using micromagnetic simulations.

9 pages, 5 figures

References in corpus (4)

• Microscopic approach to current-driven domain wall dynamics
• High domain wall velocities due to spin currents perpendicular to the plane
• Magnetic vortex-antivortex crystals generated by spin-polarized current
• Optimal time-dependent polarized current pattern for fast domain wall propagation in nanowires: Exact solutions for biaxial and uniaxial anisotropies

Cited by in corpus (5)

• Dynamic control of spin wave spectra using spin-polarized currents
• Periodic magnetic structures generated by spin-polarized currents in nanostripes
• Self-organization in the one-dimensional Landau-Lifshitz-Gilbert-Slonczewski equation with non-uniform anisotropy fields
• Circular stripe domains and cone state vortices in disk-shaped exchange coupled magnetic heterostructures
• Patterns formation in axially symmetric Landau-Lifshitz-Gilbert-Slonczewski equations