Bias-field-free spin Hall nano-oscillators with an out-of-plane precession mode

Abstract

Spin Hall nano-oscillators (SHNOs) are promising candidates for new microwave oscillators with high durability due to a small driving current. However, conventional SHNOs with an in-plane precession (IPP) mode require a bias field for stable oscillations which is not favored in certain applications such as neuromorphic computing. Here, we propose and theoretically analyze a bias-field-free SHNO with an in-plane hard axis and an out-of-plane precession (OPP) mode by solving the Landau-Lifshitz-Gilbert (LLG) equation analytically and numerically. We derive formulas for driving currents and precession frequency, and show that they are in good agreement with numerical simulation results. We show that our proposed SHNOs can be driven by much smaller bias current than conventional spin torque nano-oscillators.

References in corpus (13)

• Spin torque switching with the giant spin Hall effect of tantalum
• Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
• Room-temperature perpendicular magnetization switching through giant spin-orbit torque from sputtered BixSe(1-x) topological insulator material
• A conductive topological insulator with colossal spin Hall effect for ultra-low power spin-orbit-torque switching
• Magnetic oscillations driven by the spin Hall effect in 3-terminal magnetic tunnel junction devices
• Nanowire Spin Torque Oscillator Driven by Spin Orbit Torques
• Ultralow-current-density and bias-field-free spin-transfer nano-oscillator
• Instability analysis of spin torque oscillator with an in-plane magnetized free layer and a perpendicularly magnetized pinned layer
• Nonlinear analysis of magnetization dynamics excited by spin Hall effect
• Critical current density of a spin-torque oscillator with an in-plane magnetized free layer and an out-of-plane magnetized polarizer

Cited by in corpus (5)

• Ultrahigh efficient spin-orbit torque magnetization switching in all-sputtered topological insulator - ferromagnet multilayers
• Efficient spin current source using a half-Heusler alloy topological semimetal with Back-End-of-Line compatibility
• Giant spin Hall effect in half-Heusler alloy topological semimetal YPtBi grown at low temperature
• Reconfigurable neural spiking in bias field-free spin Hall nano oscillator
• Out-of-plane magnetization oscillation in spin Hall device assisted by field-like torque