Magnetization oscillations and waves driven by pure spin currents

Abstract

Recent advances in the studies of pure spin currents - flows of angular momentum (spin) not accompanied by the electric currents - have opened new horizons for the emerging technologies based on the electron's spin degree of freedom, such as spintronics and magnonics. The main advantage of pure spin current, as compared to the spin-polarized electric current, is the possibility to exert spin transfer torque on the magnetization in thin magnetic films without electrical current flow through the material. In addition to minimizing Joule heating and electromigration effects, this characteristic enables the implementation of spin torque devices based on the low-loss insulating magnetic materials, and offers an unprecedented geometric flexibility. Here we review the recent experimental achievements in investigations of magnetization oscillations excited by pure spin currents in different magnetic nanosystems based on metallic and insulating magnetic materials. We discuss the spectral properties of spin-current nano-oscillators, and relate them to the spatial characteristics of the excited dynamic magnetic modes determined by the spatially-resolved measurements. We also show that these systems support locking of the oscillations to external microwave signals, as well as their mutual synchronization, and can be used as efficient nanoscale sources of propagating spin waves.

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• Route toward high-speed nano-magnonics
• Mutual synchronization of nano-oscillators driven by pure spin current
• Micro-focused Brillouin light scattering study of the magnetization dynamics driven by Spin Hall effect in a transversely magnetized NiFe nanowire

Cited by in corpus (57)

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• Roadmap of spin-orbit torques
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• Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating
• Chiral spin-wave velocities induced by all-garnet interfacial Dzyaloshinskii-Moriya interaction in ultrathin yttrium iron garnet films
• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Spin-orbit-torque magnonics
• Bose-Einstein Condensation of Quasi-Particles by Rapid Cooling
• Bridging magnonics and spin-orbitronics
• Chiral Pumping of Spin Waves
• Emission of coherent propagating magnons by insulator-based spin-orbit torque oscillators
• Controlled nonlinear magnetic damping in spin-Hall nano-devices
• Chiral excitation of spin waves in ferromagnetic films
• Magnon Accumulation in Chirally Coupled Magnets
• True amplification of spin waves in magnonic nano-waveguides
• Evidence for spin current driven Bose-Einstein condensation of magnons
• Chemical potential of quasi-equilibrium magnon gas driven by pure spin current
• Chiral coupling of magnons in waveguides
• Unidirectional orbital magnetoresistance in light metal/ferromagnet bilayers
• Efficient Gating of Magnons by Proximity Superconductors
• Width dependent auto-oscillating properties of constriction based spin Hall nano-oscillators
• Magnetic droplet solitons generated by pure spin currents
• Nanoconstriction spin-Hall oscillator with perpendicular magnetic anisotropy
• Magnon Trap by Chiral Spin Pumping
• Surface dynamics of rough magnetic films
• Magnons Parametric Pumping in Bulk Acoustic Waves Resonator
• Spin-torque oscillation in a magnetic insulator probed by a single-spin sensor
• Mitigation of Gilbert Damping in the CoFe/CuOx Orbital Torque System
• Magnetic Droplet Solitons
• Dynamical mode coupling and coherence in spin Hall nano-oscillator with perpendicular magnetic anisotropy
• Non-Contact Spin Pumping by Microwave Evanescent Fields
• Nonreciprocal surface magnetoelastic dynamics
• Orbital Pumping in Ferrimagnetic Insulators
• Geometric magnonics with chiral magnetic domain walls
• Spin-Wave Doppler Shift by Magnon Drag in Magnetic Insulators
• Effects of spin-orbit torque on the ferromagnetic and exchange spin wave modes in ferrimagnetic CoGd alloy
• Elongated Skyrmion as Spin Torque Nano-Oscillator and Magnonic Waveguide
• Spin-wave Confinement and Coupling in Organic-Based Magnetic Nanostructures
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• Controllable excitation of quasi-linear and bullet modes in a spin-Hall nano-oscillator
• Spin orbit torque nano-oscillators by dipole field-localized spin wave modes
• Nonreciprocal Spin Waves Driven by Left-Hand Microwaves
• Ultrathin bismuth-yttrium iron garnet films with tunable magnetic anisotropy
• Spin-orbit torque: Moving towards two-dimensional van der Waals heterostructures
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• Disambiguating electrical detection of magnetization dynamics in magnetic insulators