Voltage-Modulated Magneto-Dynamics in Spin Hall Nano-Oscillators

Abstract

Spin Hall nano-oscillators (SHNOs) have garnered attention due to their broad application prospects in microwave generators, information storage, and artificial intelligence computing. This has necessitated the development of efficient methods to control the magneto-dynamics of SHNOs. Magnetic field control requires a field generator, and current control suffers from a narrow frequency range and low efficiency. We present an approach to efficiently control the SHNO magneto-dynamics, i.e., a piezoelectric-based SHNO system, to achieve voltage-modulated magneto-dynamics through magneto-electric coupling. Through micromagnetic simulations, this work demonstrates the indirect control of the magneto-dynamics by voltage-modulated magnetic anisotropy, revealing the impact of changes in magnetic anisotropy on the magneto-dynamics and the underlying physical mechanisms. This discovery enhances the degree of freedom for electrical modulation of SHNOs and contributes to developing advanced spintronic devices.