Energy-efficient W${}_{\text{100-x}}$Ta${}_{\text{x}}$/CoFeB/MgO spin Hall nano-oscillators

Abstract

We investigate a W-Ta alloying route to reduce the auto-oscillation current densities and the power consumption of nano-constriction based spin Hall nano oscillators. Using spin-torque ferromagnetic resonance (ST-FMR) measurements on microbars of W${}_{\text{100-x}}$Ta${}_{\text{x}}$(5 nm)/CoFeB(t)/MgO stacks with t = 1.4, 1.8, and 2.0 nm, we measure a substantial improvement in both the spin-orbit torque efficiency and the spin Hall conductivity. We demonstrate a 34\% reduction in threshold auto-oscillation current density, which translates into a 64\% reduction in power consumption as compared to pure W-based SHNOs. Our work demonstrates the promising aspects of W-Ta alloying for the energy-efficient operation of emerging spintronic devices.

References in corpus (37)

• Spin torque switching with the giant spin Hall effect of tantalum
• Spin Hall effect
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
• Layer thickness dependence of the current induced effective field vector in Ta|CoFeB|MgO
• Roadmap of spin-orbit torques
• Role of transparency of platinum-ferromagnet interface in determining intrinsic magnitude of spin Hall effect
• Dependence of the Efficiency of Spin Hall Torque on the Transparency of Pt-Ferromagnetic Layer Interfaces
• Magnetic oscillations driven by the spin Hall effect in 3-terminal magnetic tunnel junction devices
• Highly efficient spin current generation by the spin Hall effect in Au${}_{1-x}$Pt${}_x$
• Nanowire Spin Torque Oscillator Driven by Spin Orbit Torques
• Planar Hall torque
• Enhancement of the Anti-Damping Spin Torque Efficacy of Platinum by Interface Modification
• Spin-Orbit-Torque Driven Propagating Spin Waves
• Memristive control of mutual SHNO synchronization for neuromorphic computing
• The spin Hall effect of Bi-Sb alloys driven by thermally excited Dirac-like electrons
• An Intrinsic Spin Orbit Torque Nano-Oscillator
• Giant Enhancement of Intrinsic Spin Hall Conductivity in $\beta$ Tungsten via Substitutional Doping
• Giant Intrinsic Spin Hall Effect in W${}_3$Ta and other A15 Superconductors
• Spin-orbit-torque magnonics
• On the origin of magnetization auto-oscillations in constriction-based spin Hall nano-oscillators
• CMOS compatible W/CoFeB/MgO spin Hall nano-oscillators with wide frequency tunability
• Microwave power generated by a spin-torque oscillator in the presence of noise
• Bridging magnonics and spin-orbitronics
• Giant voltage control of spin Hall nano-oscillator damping
• Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers
• Domain wall-based spin-Hall nano-oscillators
• Mapping out the spin-wave modes of constriction-based spin Hall nano-oscillators in weak in-plane fields
• Enhancement of spin Hall conductivity in W-Ta alloy
• Width dependent auto-oscillating properties of constriction based spin Hall nano-oscillators
• Combined frequency and time domain measurements on injection-locked, constriction-based spin Hall nano-oscillators
• Paving Spin-Wave Fibers in Magnonic Nanocircuits Using Spin-Orbit Torque
• Bipolar spin Hall nano-oscillators
• Spatial Mapping of Torques within a Spin Hall Nano-oscillator
• Dimensional crossover in spin Hall oscillators
• Compositional effect on auto-oscillation behavior of Ni100-xFex/Pt spin Hall nano-oscillators

Cited by in corpus (9)

• Robust mutual synchronization in long spin Hall nano-oscillator chains
• Spin wave-driven variable-phase mutual synchronization in spin Hall nano-oscillators
• Interfacial origin of unconventional spin-orbit torque in Py/$\gamma -$IrMn${}_3$
• Magnetic Proximity induced efficient charge-to-spin conversion in large area PtSe${}_2$/Ni${}_{80}$Fe${}_{20}$ heterostructures
• Power efficient ReLU design for neuromorphic computing using spin Hall effect
• Phase noise analysis of mutually synchronized spin Hall nano-oscillators
• Large Non-Volatile Frequency Tuning of Spin Hall Nano-Oscillators using Circular Memristive Nano-Gates
• Mutual synchronization in spin torque and spin Hall nano-oscillators
• Energy-efficient spin Hall nano-oscillators using near-compensated CoGd ferrimagnets