Large amplitude oscillation of magnetization in spin-torque oscillator stabilized by field-like torque

摘要

Oscillation frequency of spin torque oscillator with a perpendicularlymagnetized free layer and an in-plane magnetized pinned layer is theoreticallyinvestigated by taking into account the field-like torque. It is shown that thefield-like torque plays an important role in finding the balance between theenergy supplied by the spin torque and the dissipation due to the damping,which results in a steady precession. The validity of the developed theory isconfirmed by performing numerical simulations based on theLandau-Lifshitz-Gilbert equation.