Current-induced magnetic vortex core switching in a Permalloy nanodisk
arXiv:cond-mat/0702048 · doi:10.1063/1.2780107
Abstract
We report on the switching of a magnetic vortex core in a sub-micron Permalloy disk, induced by a short current pulse applied in the film plane. Micromagnetic simulations including the adiabatic and non-adiabatic spin-torque terms are used to investigate the current-driven magnetization dynamics. We predict that a core reversal can be triggered by current bursts a tenth of a nanosecond long. The vortex core reversal process is found to be the same as when an external field pulse is applied. The control of a vortex core's orientation using current pulses introduces the technologically relevant possibility to address individual nanomagnets within dense arrays.
3 pages, 3 figures
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- Regular and chaotic vortex core reversal by a resonant perpendicular magnetic field
- Polarization-selective vortex-core switching by orthogonal Gaussian-pulse currents
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- Topological changes of two-dimensional magnetic textures
- Oersted fields and current density profiles in spin-torque driven magnetization dynamics -- Finite element modelling of realistic geometries
- Fast vortex wall motion in wide Permalloy strips from double switching of the vortex core
- Switching of the Magnetic Vortex Core in a Pac-man Disk using a Single Field-Pulse
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- Fast and deterministic switching of vortex core induced by out-of-plane current in notch disks
- Tunable Ultrafast Dynamics of Antiferromagnetic Vortices in Nanoscale Dots
- Topological textures and their bifurcation processes in 2D ferromagnetic thin films
- Current-controlled periodic double-polarity reversals in a spin-torque vortex oscillator
- Optical Manipulation of Magnetic Vortex Visualized in situ by 4D Electron Microscopy