Parametric excitation of magnetization oscillations controlled by pure spin current

Synchronization of Self-oscillations by Parametric Excitation

This paper is devoted to the problem of synchronization of symmetrically coupled self-oscillators exhibiting chaos by means of chaos control technique. We use a nonfeedback method of control, in particular, high frequency periodic modulation of the coefficient of coupling. The model of Chua’s circuits coupled via capacity is considered in this work. We study the possibility of synchronization i...

Excitation of coherent propagating spin waves by pure spin currents.

Utilization of pure spin currents not accompanied by the flow of electrical charge provides unprecedented opportunities for the emerging technologies based on the electron's spin degree of freedom, such as spintronics and magnonics. It was recently shown that pure spin currents can be used to excite coherent magnetization dynamics in magnetic nanostructures. However, because of the intrinsic no...

Current-Controlled Magnetization Dynamics in the Spin-Flip Transistor

On a Model of Magnetization Switching by Spin-polarized Current

This paper is concerned with global existence of weak solutions to a model equations of magnetization reversal by spin-polarized current in a layer introduced in [18]. The local magnetization of the ferromagnet satisfies the usual Landau-Lifshitz equation which is coupled to the nonlinear heat equation satisfied by the spin accumulation field defined in all the layer. The coupling is due to the...

Magnetization reversal of permalloy film by pure spin current injection: relation between reversal time and injected surface

The dynamics of the magnetization reversal process in a nanosized permalloy film by the pure spin current (PSC) injection is analyzed. We have performed micromagnetic simulation based on the Landau-Lifshitz equation taking into account both the relaxation term and spin transfer torque term caused by the PSC. PSC is injected into the permalloy from a side of the film. We compare the magnetizatio...