Quantitative understanding of magnetic vortex oscillations driven by spin-polarized out-of-plane dc current: Analytical and micromagnetic numerical study

Abstract

We studied magnetic vortex oscillations associated with vortex gyrotropic motion driven by spin-polarized out-of-plane dc current by analytical and micromagnetic numerical calculations. Reliable controls of the tunable eigenfrequency and orbital amplitude of persistent vortex oscillations were demonstrated. This work provides an advanced step towards the practical application of vortex oscillations to persistent vortex oscillators in a wide frequency (f) range of 10 to 2000 MHz and with high values of f/(delta f).

27 pages, 4 figures, 2 tables

References in corpus (7)

• Current-driven vortex oscillations in metallic nanocontacts
• Current-driven resonant excitation of magnetic vortex
• 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
• Two Circular-Rotational Eigenmodes in Vortex Gyrotropic Motions in Soft Magnetic Nanodots
• Switching of the vortex polarity in a magnetic nanodisk by a DC current

Cited by in corpus (7)

• Dynamics of two coupled vortices in a spin valve nanopillar excited by spin transfer torque
• Non-uniformity of a planar polarizer as a reason of spin-transfer induced vortex oscillations at zero field
• Edge-Soliton-Mediated Vortex-Core Reversal Dynamics
• Parametric oscillator based on non-linear vortex dynamics in low resistance magnetic tunnel junctions
• Mutual conversion between a magnetic Neel hopfion and a Neel toron
• Externally-driven transformations of vortex textures in flat submicrometer magnets
• Vortex ground state for small arrays of magnetic particles with dipole coupling