Influence of perpendicular magnetic field and polarized current on the dynamics of coupled magnetic vortices in a thin nanocolumnar trilayer conducting structure

Joint Effect of a Magnetic Field and a Spin-Polarized Current on Polarity Switching of Magnetic Vortices in a Spin-Transfer Nanooscillator

“…With the " dynamic" mechanism of polarity switching, when the initial vortex accelerates to a certain speed, a pair is generated from a new vortex with opposite polarity and an antivortex, followed by annihilation of the initial vortex with the antivortex. The mechanisms of polarity switching of magnetic vortices were studied using spin-polarized current and magnetic field for STNO of medium and small diameters [9,12,14]. In the present paper, we theoretically study the combined effect of the external perpendicular magnetic field and current on the separate switching of the vortices polarity in STNO of large diameter (400 nm), when the magnetic vortex cannot fly out of the edge of the disk.…”

“…The properties of a vortex STNO, when the magnetic vortex exists in each of the magnetic layers [8][9][10][11][12][13][14], largely depend on the polarity of the vortices. It is theoretically shown that with the help of a spin-polarized current it is possible to excite gyrotropic oscillations of magnetostatically coupled vortices with a constant frequency, which can change when the magnetic field is applied [12,13]. Previously, it was shown [12,15] that with the help of spin-polarized current, using the " dynamic" mechanism, it is possible to switch the vortex polarity only in a thick STNO magnetic layer.…”

“…It is theoretically shown that with the help of a spin-polarized current it is possible to excite gyrotropic oscillations of magnetostatically coupled vortices with a constant frequency, which can change when the magnetic field is applied [12,13]. Previously, it was shown [12,15] that with the help of spin-polarized current, using the " dynamic" mechanism, it is possible to switch the vortex polarity only in a thick STNO magnetic layer. With the " dynamic" mechanism of polarity switching, when the initial vortex accelerates to a certain speed, a pair is generated from a new vortex with opposite polarity and an antivortex, followed by annihilation of the initial vortex with the antivortex.…”

“…2). Such a mechanism of vortex polarity switching can be called " quasi-static" [12,14]. The process of polarity switching is accompanied by the excitation of internal oscillation modes of the vortex and the emission of spin waves.…”

Topological waveguide based on metamaterials of magnetic solitons

“…( 18), we read that the frequency of bound state is determined by the gyrotropic frequency of a single magnetic soliton, which is tunable by external perturbations. For example, in the presence of an effective magnetic field H eff perpendicular to the disk plane, the gyrotropic frequency can be described as [48,49]:…”