2020/05/15 by Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi +4 · 3 citations
Physics and Astronomy · #Dynamics (music) #Excited state #Magnetic properties of thin films #Mechanical and Optical Resonators #Quantum and electron transport phenomena #Spectrum (functional analysis) #Spin (aerodynamics) #Spin wave #Torque #Transmission (telecommunications) #cond-mat.mes-hall
paper · pdf · doi:10.1063/5.0013102
published in Applied Physics Letters 117(2) (American Institute of Physics) · 15 pages, 3 figures
arxiv created 2020/05/15 · openalex created_date 2020/05/21 · openalex publication_date 2020/07/13 · arxiv updated 2020/07/20 · openalex updated_date 2026/08/06
We investigate the spectral characteristics of a spin torque oscillator (STO) excited by the spin Hall-induced spin current. We observe that the modest spin current injection triggers the conventional single peak oscillating behavior of the STO. As the spin current is further increased to enter the non-linear regime, we find the transition of the spectrum from a single peak to a multipeak structure whose frequency spacing is constant. This behavior can be primarily explained by the extremely broadened peak of the STO, which is accompanied by the frequency-dependent filtering by the transmission line. To explain the observation more quantitatively, we also discuss that the multipeak may reflect the characteristics of the intrinsic dynamics of the STO in the non-linear regime.