Simulation of microwave excitation in micro strip line induced by radio-frequency signal amplification using magnetic tunnel junctions

摘要

Magnetic tunnel junctions (MTJs) is promising for radio-frequency (rf) device in spintronics, such as spin-torque diode effect, spin-torque oscillator, and rf amplifier. The rf amplifier have been attempted by ferromagnetic resonance (FMR) in MTJ system with direct current application. Recently, our group succeeded to amplify the rf signal measured by Sn signal [1]. The rf-signal can be enhanced by mutual phase-locking [2] between MTJ and external resonator such as micro strip line.