Electric-field control of spin-wave packets excitations

Abstract

In this paper, we introduce a design concept for a spin-torque nano-oscillator capable of generating spin-wave (SW) packets using magnetic droplets tuned by an electric field (E-field). A comparison is made between this device concept and a conventional setup, where SWs are generated by an oscillating external magnetic field, revealing similar results. The design incorporates a CoFeB layer with perpendicular magnetic anisotropy, acting as a waveguide for propagating SW packets. Adjusting the pulse width of applied E-fields leads to observable changes in the amplitude and periodicity of SW packets. Additionally, this study explores the potential of encoding SW packets as binary signals (“0” and “1”). The findings offer valuable insights into the applications of magnetic droplets and electric-field tuning for spin-wave packet generation, with potential implications for various spintronic devices and technologies.