Self-Oscillation in Spin Torque Oscillator Stabilized by Field-like Torque

摘要

The self-oscillation of the magnetization in a spin torque oscillator (STO)with a perpendicularly magnetized free layer and an in-plane magnetized pinnedlayer in the absence of an applied magnetic field was studied by numericallysolving the Landau-Lifshitz-Gilbert equation. It was pointed out thatfield-like torque was necessary to realize stable self-oscillation in this typeof STO at zero field. The numerical simulation at finite temperature showedthat the presence of the field-like torque led to a high power with arelatively high oscillation frequency.