The Possibility of Controlling the Dynamics and Structure of a Magnetic Soliton in a Three-Layer Ferromagnetic Structure

Abstract

Generation and excitation of a magnetic soliton in a three-layer ferromagnet using dc magnetic fields and weak ac fields in the presence of dissipation in the system have been considered. An analysis of the solutions to the equation of motion in an ac field shows the possibility of increasing the magnetic-soliton amplitude with time under certain conditions. The resonance effect is also affected by the geometric parameters of the thin layer: the translational mode of soliton oscillations is excited at a large layer width.

Voltage-controlled magnetic solitons motion in an anisotropic ferromagnetic nanowire

“…The nature of the solutions, whether they are solitons or periodic solutions, is dictated by the sign of Γ 2 , where Γ 2 > 0 corresponds to solitons, and Γ 2 < 0 corresponds to periodic solutions. What's more, the dark solitons, anti-dark solitons, can be distinguished by comparing the value at infinity of the solution |ψ | 2 infinity = a 2 − 2k/σ with the extreme value |ψ | 2 extreme = (a − 2βη/σ) 2 of equation (10). It generates an anti-dark soliton when |ψ | 2 extreme > |ψ | 2 infinity , otherwise a dark soliton.…”

“…It generates an anti-dark soliton when |ψ | 2 extreme > |ψ | 2 infinity , otherwise a dark soliton. Figure 2 shows the classification of exact solutions (10), which can be divided into four distinct situations according to the parameter conditions. Figure 2(a) illustrates the distribution range of different solutions when the wave number k = 0.…”

“…Magnetic materials play a vital role in modern information storage, compared to traditional semiconductor memory, they possess higher stability and reliability characteristics [1][2][3][4][5][6]. Magnetic solitons on the ferromagnetic nanoscale have been studied extensively as information carriers for memory storage device applications [7][8][9][10][11][12]. However, the precise manipulation of magnetic solitons remains a challenge and is regarded as an important process in magnetic storage.…”