Analysis method of a spin-torque oscillator using dc resistance change during injection locking to an external microwave magnetic field

Spin torque oscillators (STOs) that generate a persistent magnetization oscillation by spin-transfer torque are promising spintronic devices for various applications. In this study, we propose and experimentally demonstrate a method to characterize the magnetization dynamics of STOs using injection locking. By placing the STO near an antenna that generates a microwave magnetic field of a variable frequency (fMW), injection locking of the STO to...