Controlled nonlinear magnetic damping in spin-Hall nano-devices

Abstract

Large-amplitude magnetization dynamics is substantially more complex compared to the low-amplitude linear regime, due to the inevitable emergence of nonlinearities. One of the fundamental nonlinear phenomena is the nonlinear damping enhancement, which imposes strict limitations on the operation and efficiency of magnetic nanodevices. In particular, nonlinear damping prevents excitation of coherent magnetization auto-oscillations driven by the injection of spin current into spatially extended magnetic regions. Here, we propose and experimentally demonstrate that nonlinear damping can be controlled by the ellipticity of magnetization precession. By balancing different contributions to anisotropy, we minimize the ellipticity and achieve coherent magnetization oscillations driven by spatially extended spin current injection into a microscopic magnetic disk. Our results provide a novel route for the implementation of efficient active spintronic and magnonic devices driven by spin current.

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Cited by in corpus (21)

• Magnetization Dynamics of Nanoscale Magnetic Materials: A Perspective
• Spin-orbit-torque magnonics
• True amplification of spin waves in magnonic nano-waveguides
• Evidence for spin current driven Bose-Einstein condensation of magnons
• Nonlocal detection of interlayer three-magnon coupling
• Radio-Frequency Multiply-And-Accumulate Operations with Spintronic Synapses
• Easy-plane spin Hall nano-oscillators as spiking neurons for neuromorphic computing
• Hybrid spin Hall nano-oscillators based on ferromagnetic metal/ferrimagnetic insulator heterostructures
• Spin-orbit torque control of spin waves in a ferromagnetic waveguide
• Interplay between nonlinear spectral shift and nonlinear damping of spin waves in ultrathin YIG waveguides
• Dimensional crossover in spin Hall oscillators
• Magnon transport in ${\mathbf{Y}}_3\mathbf{F}{\mathbf{e}}_5{\mathbf{O}}_{12}$/Pt nanostructures with reduced effective magnetization
• Direct observation of current-induced nonlinear spin torque in Pt-Py bilayers
• Energy and momentum conservation in spin transfer
• Easy-plane spin Hall oscillator
• Non-local magnon transconductance in extended magnetic insulating films.\\ Part I: spin diode effect
• Non-local magnon transconductance in extended magnetic insulating films.\\Part II: two-fluid behavior
• Spin orbit torque nano-oscillators by dipole field-localized spin wave modes
• Nonlinear analog spintronics with van der Waals heterostructures
• Resonant inter-mode second harmonic generation by backward spin waves in YIG nano-waveguides
• Nonlinear suppression of dispersion broadening of ultrashort spin-wave pulses in thin YIG films