Spin hall nano-oscillators based on two-dimensional Fe3GeTe2 magnetic materials

Abstract

Two-dimensional (2D) magnetic materials with high perpendicular anisotropy, such as Fe₃GeTe₂, have the potential to build spintronic devices with better performance and lower power consumption. Here, we examine microwave emissions in Fe₃GeTe₂/Pt spin Hall nano-oscillators with different numbers of layers of Fe₃GeTe₂ using micromagnetic simulations. We predict that auto-oscillation with a frequency of >30 GHz can be driven by spin–orbit torque (SOT) and the frequency is tunable with current. Observing the dynamic behaviors of magnetization dynamic reveals that non-localized spin-wave propagates in Fe₃GeTe₂ with a spatially varied wavelength due to Joule heat and forms certain special bubble-like magnetic structure. Our results indicate SHNOs comprising a 2D magnetic material has the potential to develop future spintronic oscillator with low power consumption and high performance.