Vortex oscillations induced by a spin-polarized current in a magnetic nanopillar: Evidence for a failure of the Thiele approach

Abstract

We investigate the vortex excitations induced by a spin-polarized current in a magnetic nanopillar by means of micromagnetic simulations and analytical calculations. Damped motion, stationary vortex rotation and the switching of the vortex core are successively observed for increasing values of the current. We demonstrate that even for small amplitude of the vortex motion, the analytical description based the classical Thiele approach can yield quantitatively and qualitatively unsound results. We suggest and validate a new analytical technique based on the calculation of the energy dissipation.

References in corpus (8)

• Magnetic vortex oscillator driven by dc spin-polarized current
• Electrical switching of vortex core in a magnetic disk
• Dynamics of domain walls in magnetic nanostrips
• Dynamic Origin of Vortex Core Switching in Soft Magnetic Nanodots
• Current-driven vortex oscillations in metallic nanocontacts
• Low-frequency vortex dynamic susceptibility and relaxation in mesoscopic ferromagnetic dots
• Excitation of spin dynamics by spin-polarized current in vortex state disks
• Harmonic oscillator model for current- and field-driven magnetic vortices

Cited by in corpus (44)

• Skyrmion-skyrmion and skyrmion-edge repulsions in skyrmion-based racetrack memory
• Large microwave generation from d.c. driven magnetic vortex oscillators in magnetic tunnel junctions
• Rotating skyrmion lattices by spin torques and field or temperature gradients
• A skyrmion-based spin-torque nano-oscillator
• Spin transfer nano-oscillators
• Spin torque nano-oscillators based on antiferromagnetic skyrmions
• Current induced rotational torques in the skyrmion lattice phase of chiral magnets
• Dynamics of two coupled vortices in a spin valve nanopillar excited by spin transfer torque
• Spin torque resonant vortex core expulsion for an efficient radio-frequency detection scheme
• Phase locking dynamics of dipolarly coupled vortex-based spin transfer oscillators
• Phase locking of vortex based spin transfer oscillators to a microwave current
• Non-uniformity of a planar polarizer as a reason of spin-transfer induced vortex oscillations at zero field
• A spiking neuron constructed by the skyrmion-based spin torque nano-oscillator
• Describing synchronization and topological excitations in arrays of magnetic spin torque oscillators through the Kuramoto model
• Origin of spectral purity and tuning sensitivity in a vortex-based spin transfer nano-oscillator
• Perfect and robust phase-locking of a spin transfer vortex nano-oscillator to an external microwave source
• Optimizing magneto-dipolar interactions for synchronizing vortex based spin-torque nano-oscillators
• Parallel pumping of magnetic vortex gyrations in spin-torque nano-oscillators
• Periodic structure of memory function in spintronics reservoir with feedback current
• Critical velocity for the vortex core reversal in perpendicular bias magnetic field
• Edge-Soliton-Mediated Vortex-Core Reversal Dynamics
• Reversal process of a magnetic vortex core under the combined action of a perpendicular field and spin transfer torque
• Step-like dependence of memory function on pulse width in spintronics reservoir computing
• Temperature dependence of microwave voltage emission associated to spin-transfer induced vortex oscillation in magnetic tunnel junction
• Chiral skyrmion auto-oscillations in a ferromagnet under spin transfer torque
• Effective damping enhancement in noncollinear spin structures
• Synchronization of chiral vortex nano-oscillators
• Probing phase coupling between two spin-torque nano-oscillators with external source
• Quenched Slonczewski-Windmill in Spin-Torque Vortex-Oscillators
• Enhancing the injection locking range of spin torque oscillators through mutual coupling
• Input-driven chaotic dynamics in vortex spin-torque oscillator
• Magnetic vortex-antivortex crystals generated by spin-polarized current
• Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics
• Large amplitude vortex gyration in Permalloy/Bi${}_2$Se${}_3$-like heterostructures
• Nontrivial Aharonov-Bohm effect and alternating dispersion of magnons in cone-state ferromagnetic rings
• Off-centered immobile magnetic vortex under influence of spin-transfer torque
• Externally-driven transformations of vortex textures in flat submicrometer magnets
• Vortex ground state for small arrays of magnetic particles with dipole coupling
• Associative memory by virtual oscillator network based on single spin-torque oscillator
• Chaotic magnetization dynamics driven by feedback magnetic field
• Quantitative and realistic description of the magnetic potential energy of spin-torque vortex oscillators
• Nonlinear spin dynamics of ferromagnetic ring in the vortex state and its application for spin-transfer nano-oscillator
• Role of Magnetic Field in Self-Oscillation of Nanomagnet Excited by Spin Torque
• Efficient Synchronization of Dipolarly Coupled Vortex-Based Spin Transfer Nano-Oscillators