Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current

Abstract

We describe direct electrical measurements of microwave-frequency dynamics in individual nanomagnets that are driven by spin transfer from a DC spin-polarized current. We map out the dynamical stability diagram as a function of current and magnetic field, and we show that spin transfer can produce several different types of magnetic excitations, including small-angle precession, a more complicated large-angle motion, and a high-current state that generates little microwave signal. The large-angle mode can produce a significant emission of microwave energy, as large as 40 times the Johnson-noise background.

12 pages, 3 figures

References in corpus (11)

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• Surface spin-transfer torque and spin-injection effective field in ferromagnetic junctions: Unified theory
• Synchronization and chaos in spin-transfer-torque nano-oscillators coupled via a high speed Op Amp
• Quantum Scattering Theory of Spin Transfer Torque, Spin Pumping and Fluctuations
• Mutual phase-locking in high frequency microwave nanooscillators as function of field angle
• Phase noise analysis of mutually synchronized spin Hall nano-oscillators
• Magnetization reversal driven by spin-injection : a mesoscopic spin-transfer effect
• Modulation and phase-locking in nanocontact vortex oscillators
• Phase locking of spin transfer nano-oscillators using common microwave sources
• Spin Torque and its Relation to Spin Filtering
• All-Optical Generation and Tuning of Ultrafast Spin-Hall Current via Optical Vortices
• Magneto Acoustic Spin Hall Oscillators
• Spin-Hall effect in topological materials: Evaluating the proper spin current in systems with arbitrary degeneracies
• Magnon instability driven by heat current in magnetic bilayers
• Frequency converter based on nanoscale MgO magnetic tunnel junctions
• Current-induced spin polarization in isotropic k-cubed Rashba model: Theoretical study for p-doped semiconductor heterostructures and perovskite oxides interfaces
• A quasi-linear spin-torque nano-oscillator via enhanced negative feedback of power fluctuations
• Effects of the Zhang-Li Torque on Spin Torque nano Oscillators
• Non-linear spin torque, pumping and cooling in superconductor/ferromagnet systems
• Nanoscale Spin Injector Driven by a Microwave Voltage
• Theory of atomistic simulation of spin-transfer torque in nanomagnets
• Effective attraction induced by repulsive interaction in a spin-transfer system
• Planar approximation for the frequencies of spin transfer oscillators
• Spin-torque effect on spin wave modes in magnetic nanowires
• Spin pumping and torque statistics in the quantum noise limit
• Active electromagnetic metamaterial based on spin torque oscillators
• Gate-control of spin-motive force and spin-torque in Rashba SOC systems
• A Scattering method to the equilibrium spin current in a ferromagnet junction
• Nanofabrication of spin-transfer torque devices by a PMMA mask one step process: GMR versus single layer devices
• Critical current density of a spin-torque oscillator with an in-plane magnetized free layer and an out-of-plane magnetized polarizer
• Current-Driven Switching in Magnetic Multilayer Nanopillars
• Selective control of vortex polarities by microwave field in two robustly synchronized spin-torque nano-oscillators
• Electrically induced angular momentum flow between separated ferromagnets
• Non-equilibrium thermodynamic study of magnetization dynamics in the presence of spin-transfer torque
• Spin torque driven dynamics of a coupled two layer structure: interplay between conservative and dissipative coupling
• Current-controlled magnetization dynamics in the spin-flip transistor
• High Frequency Microwave Emission of a Tri-layer Magnetic Tunnel Junction in the Absence of External Bias-Magnetic Field
• Large amplitude oscillation of magnetization in spin-torque oscillator stabilized by field-like torque
• Chaotic Spin Dynamics of a Long Nanomagnet Driven by a Current
• Optimization of the current pulse for spin-torque switches
• Spin elastodynamic motive force
• Self-organization in the one-dimensional Landau-Lifshitz-Gilbert-Slonczewski equation with non-uniform anisotropy fields
• Domain wall dynamics driven by a localized injection of a spin-polarized current
• Spin-current driven spontaneous coupling of ferromagnets
• Twist in the bias-dependence of spin-torques in magnetic tunnel junctions
• Phase-resolved imaging of edge-mode spin waves using scanning transmission x-ray microscopy
• Choking non-local magnetic damping in exchange biased ferromagnets
• Optical initialization of hole spins in p-doped quantum dots: orientation efficiency and loss of coherence
• Influence of interlayer coupling on the spin torque driven excitations in a spin torque oscillator
• Focused-ion-beam milling based nanostencil mask fabrication for spin transfer torque studies
• Transition from one- to two-mode generation regime in spin-torque nano-oscillator mediated by thermal noise
• Zero-field magnetization reversal of two-body Stoner particles with dipolar interaction
• Parametric resonance of spin waves in ferromagnetic nanowires tuned by spin Hall torque
• Out-of-plane magnetization oscillation in spin Hall device assisted by field-like torque
• Effects of delayed feedback on the power spectrum of spin-torque nano-oscillators
• Current-induced asymmetric magnetoresistance due to energy transfer via quantum spin-flip process
• Optimal control of magnetization dynamics in ferromagnetic heterostructures by spin--polarized currents
• Phase locking in voltage-controlled parametric oscillator
• Joule Heating and Current-Induced Instabilities in Magnetic Nanocontacts
• Driven energy transfer between coupled modes in spin-torque oscillators
• Spin injection and pumping generated by a direct current flowing through a magnetic tunnel junction
• Towards precise measurement of oscillatory domain wall by ferromagnetic Josephson junction
• Microwave response of a magnetic single-electron transistor
• Externally-driven transformations of vortex textures in flat submicrometer magnets
• Magnetization dynamics driven by displacement currents across a magnetic tunnel junction
• Spin orbit torque nano-oscillators by dipole field-localized spin wave modes
• Nonlinear chiral photocurrent in parity-violating magnetic Weyl semimetals
• Thermal Dynamics in Symmetric Magnetic Nanopillars Driven by Spin Transfer
• Large Amplitude Spin-Hall Oscillations due to Field-like Torque
• Quantitative and realistic description of the magnetic potential energy of spin-torque vortex oscillators
• Semiclassical spin transport in LaO/STO system in the presence of multiple Rashba spin orbit couplings
• Chaotic magnetization dynamics driven by feedback magnetic field
• Synchronization of spin torque oscillators through spin Hall magnetoresistance
• Quantum mechanics of spin transfer in coupled electron-spin chains
• Out-of-plane nesting driven spin spiral in ultrathin Fe/Cu(001) films
• Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin-transfer torque using a composition-gradient film: application to Co${}_x$Fe${}_{1-x}$ (0 $\le$ $\text{x}$ $\le$ 1) system
• Spin torque antiferromagnetic nanooscillator in the presence of magnetic noise
• Dipolar field effect on microwave oscillation in a domain wall spin-valve
• Layer-selective detection of magnetization directions from two layers of antiferromagnetically-coupled magnetizations by ferromagnetic resonance using a spin-torque oscillator
• Angular dependence of the electrically driven and detected ferromagnetic resonance in Ni${}_{36}$Fe${}_{64}$ wires
• Charge conservation in spin torque oscillators leads to a self-induced torque
• Mutual synchronization in spin torque and spin Hall nano-oscillators
• Current-field diagram of magnetic states of a surface spin valve in a point contact with a single ferromagnetic film
• Dancing Synchronization in Coupled Spin-Torque Nano-Oscillators
• Current-induced magnetization dynamics in single and double layer magnetic nanopillars grown by molecular beam epitaxy
• Thermal instability in a ferrimagnetic resonator strongly coupled to a loop-gap microwave cavity
• Generation of Multipeak Spectrum of Spin Torque Oscillator in Non-linear Regime
• Internal effective field sources for spin torque nano pillar oscillators
• Spin-torque switching and control using chirped oscillating currents
• Theory of Spin-Transfer Torque in the Current-in-Plane Geometries
• Electronic control of magnonic and spintronic devices
• Electrically driven magnetic antenna based on multiferroic composites
• Zero-field dynamics stabilized by in-plane shape anisotropy in MgO-based spin-torque oscillators
• Out-of-plane auto-oscillation in spin Hall oscillator with additional polarizer
• Synchronized excitation of magnetization dynamics via spin waves in Bi-YIG thin film by slot line waveguide
• Spin dynamics and magneto-optical response in charge-neutral tunnel-coupled quantum dots
• Spintronic virtual neural network by a voltage controlled ferromagnet for associative memory
• Nonlinear spin dynamics of ferromagnetic ring in the vortex state and its application for spin-transfer nano-oscillator
• Role of Magnetic Field in Self-Oscillation of Nanomagnet Excited by Spin Torque
• Computational study of microwave oscillations in absence of external field in nonstandard spin valves in the diffusive transport limit
• Negative differential magneto-resistance in ferromagnetic wires with domain walls
• Optimizing Hybrid Ferromagnetic Metal-Ferrimagnetic Insulator Spin-Hall Nano-Oscillators: A Micromagnetic Study
• Antiferromagnetic coupling across silicon regulated by tunneling currents
• Spin-Transfer-Torque Driven Magneto-Logic Gates Using Nano Spin-Valve Pillars
• Spintronics for neuromorphic computing
• Pseudospin excitations in coaxial nanotubes
• A multi-band analogue frequency sensor with sub-MHz resolution based on a Vortex Nano-Oscillator
• Crossover between fast and slow excitation of magnetization by spin torque
• Effects of the dynamical magnetization state on spin transfer
• Coercivity reduction in a two-dimensional array of nanoparticles
• Optimal Single Quantum Dot Heat-to-pure-spin-current Converters
• Spin-transfer torque driven localized spin excitations in the presence of field-like torque
• Emerging nonequilibrium bound state in spin-current-local-spin scattering
• Phase estimation of spin-torque oscillator by nonlinear spin-torque diode effect
• Spin-transfer dynamics in MgO-based magnetic tunnel junctions with an out-of-plane magnetized free layer and an in-plane polarizer
• Magnetic oscillations Excited by Concurrent Spin Injection from a Tunneling Current and a Spin Hall Current
• Dependence of critical current of spin transfer torque-driven magnetization dynamics on free layer thickness
• Effects of Elastic Dephasing on Scaling of ultra-small Magnetic Tunnel Junctions
• Local spin transfer torque and magnetoresistance in domain walls with variable width
• Conservative effects in spin-transfer-driven magnetization dynamics
• Spin-Transfer-Torque Driven Magneto-Logic OR, AND and NOT Gates
• Spin-torque nano-oscillator based on two in-plane magnetized synthetic ferrimagnets
• A CMOS-compatible, scalable and compact magnetoelectric spin-torque microwave detector
• New mechanism for generating spin transfer torque without charge current
• Spin transport through a nanojunction with a precessing anisotropic molecular spin: Quantum interference and spin-transfer torque
• Probing domain wall dynamics in magnetic Weyl semimetals via the non-linear anomalous Hall effect
• Emergent topological quasiparticle kinetics in constricted nanomagnets
• Low-non-linearity spin-torque oscillations driven by ferromagnetic nanocontacts
• Fe- and Co-based magnetic tunnel junctions with AlN and ZnO spacers
• Periodic structure of spin-transfer current in ferromagnetic multilayers
• Spin current induced magnetization oscillations in a paramagnetic disc
• Simultaneous readout of two adjacent bit tracks with a spin-torque oscillator
• Activation of Microwave Fields in a Spin-Torque Nano-Oscillator by Neuronal Action Potentials
• Role of additional microwave voltage on phase locking in voltage-controlled parametric oscillator
• Non-equilibrium magnetism in dual spin valves
• Spin Torque Oscillations Triggered by In-plane Field
• Asymmetric angular dependence of spin-transfer torques in CoFe/Mg-B-O/CoFe magnetic tunnel junctions
• Ellipticity effects on diffusive magnon spin and heat transport in easy-plane ferromagnets
• Josephson-like magnetic tunnel junction -- transition from classical to quantum regime
• Voltage Controlled Magnetic Anisotropy Based Low Energy Switching of a Ferromagnet on a Topological Insulator
• Resonant switching using spin valves