Spin current induced dynamics and polarity switching of coupled magnetic vertices in three-layer nanopillars

Influence of the thickness of a nonmagnetic layer on the coupled dynamics of magnetic vortices in a spin-transfer nanooscillator

“…It should be noted that in this work, the dynamics of the magnetization of both magnetic layers was modeled; therefore, m ref is inhomogeneous in space, and depends on time and is determined by numerically solving the LLG equation in the entire system. This simulation approach has already been used in our previous work [12,17,20,21]. LLE is a complex integro-differential equation and the number of analytical methods applications for its solution is very limited.…”

“…These micromagnetic structures attract significant interest of researchers, as they can be much smaller than ordinary vortex ones and demonstrate interesting dynamic properties [5,7]. There are many experimental and theoretical papers devoted to the study of the magnetostatically bounded magnetic vortices dynamics [8][9][10][11][12][13][14][15][16][17]. It turned out that for a system where both magnetic layers are in a vortex state and each of them act as a polarizer and as a free layer at the same time, the spectrum line width decreases dramatically [15,16] in comparison to the single vortex spin-torque nanooscillators [1,16].…”

“…It turned out that for a system where both magnetic layers are in a vortex state and each of them act as a polarizer and as a free layer at the same time, the spectrum line width decreases dramatically [15,16] in comparison to the single vortex spin-torque nanooscillators [1,16]. The properties of such system largely depend on the mutual orientation of the vortex cores [11,16,17]. Using a spin-polarized current and anexternal magnetic field, the coupled dynamics and structure of vortices can be controlled [1,12,17 -21].…”

“…Previously, we considered the influence of the STNO diameter on the coupled dynamics of vortices under the action of a spin-polarized current [1,12,17,21]. The existence of several critical values of currents separating different modes of vortex dynamics was found.…”

Features in the Resonance Behavior of Magnetization in Arrays of Triangular and Square Nanodots

“…The quasi-vortices of the square and triangular spots represent closed domain structures with a vortex core at the center Under the action of any factors (external fields, spin-polarized currents, anisotropy field gradients, stresses, etc. ), a magnetic vortex moves along a curvilinear trajectory, being driven by the Magnus forces [4][5][6][7][8]. In analytical calculations, the well-proven rigid vortex approximation is often used.…”