Spin transfer nano-oscillators

Abstract

The use of spin transfer nano-oscillators (STNOs) to generate microwave signal in nanoscale devices have aroused tremendous and continuous research interest in recent years. Their key features are frequency tunability, nanoscale size, broad working temperature, and easy integration with standard silicon technology. In this feature article, we give an overview of recent developments and breakthroughs in the materials, geometry design and properties of STNOs. We focus in more depth on our latest advances in STNOs with perpendicular anisotropy showing a way to improve the output power of STNO towards the μW range. Challenges and perspectives of the STNOs that might be productive topics for future research were also briefly discussed.

11 pages, 10 figures, nanoscale 2013

References in corpus (53)

• Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
• Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
• Spin Transfer Torques
• Direct-Current Induced Dynamics in Co90Fe10/Ni80Fe20 Point Contacts
• Anatomy of Spin-Transfer Torque
• Measurement of the Spin-Transfer-Torque Vector in Magnetic Tunnel Junctions
• Magnetic vortex oscillator driven by dc spin-polarized current
• Mechanisms of spin-polarized current-driven magnetization switching
• Observation of spin-transfer switching in deep submicron-sized and low-resistance magnetic tunnel junctions
• Bias-driven large power microwave emission from MgO-based tunnel magnetoresistance devices
• Currents, Torques, and Polarization Factors in Magnetic Tunnel Junctions
• Large microwave generation from d.c. driven magnetic vortex oscillators in magnetic tunnel junctions
• Magnetic oscillations driven by the spin Hall effect in 3-terminal magnetic tunnel junction devices
• Current-Driven Magnetic Excitations in Permalloy-Based Multilayer Nanopillars
• Spin-Transfer Effects in Nanoscale Magnetic Tunnel Junctions
• Synchronization of spin-transfer oscillators driven by stimulated microwave currents
• Excitations of incoherent spin-waves due to spin-transfer torque
• Current-driven vortex oscillations in metallic nanocontacts
• Thermally-Activated Magnetic Reversal Induced by a Spin-Polarized Current
• Current-Driven Microwave Dynamics in Magnetic Point Contacts as a Function of Applied Field Angle
• Generation linewidth of an auto-oscillator with a nonlinear frequency shift: Spin-torque nano-oscillator
• Spin Transfer Dynamics in Spin Valves with Out-of-plane Magnetized CoNi Free Layers
• Shaped angular dependence of the spin transfer torque and microwave generation without magnetic field
• Coupling efficiency for phase locking of a spin transfer oscillator to a microwave current
• Vortex oscillations induced by a spin-polarized current in a magnetic nanopillar: Evidence for a failure of the Thiele approach
• Time-resolved detection of spin-transfer-driven ferromagnetic resonance and spin torque measurement in magnetic tunnel junctions
• Mechanisms limiting the coherence time of spontaneous magnetic oscillations driven by DC spin-polarized currents
• Large-amplitude coherent spin waves exited by spin-polarized current in nanoscale spin valves
• Time domain measurement of phase noise in a spin torque oscillator
• Phase locking of vortex based spin transfer oscillators to a microwave current
• Stochastic resonance of a nanomagnet excited by spin transfer torque
• Microwave power generated by a spin-torque oscillator in the presence of noise
• Strong linewidth variation for spin-torque nano-oscillators as a function of in-plane magnetic field angle
• Parametric excitation of a magnetic nanocontact by a microwave field
• Micromagnetic simulations of the magnetization precession induced by a spin polarized current in a point contact geometry
• Origin of the spectral linewidth in non linear oscillators based on MgO tunnel junctions
• Power and linewidth of propagating and localized modes in nanocontact spin-torque oscillators
• Experimental Test of Analytic Theory of Spin Torque Oscillator Dynamics
• Micromagnetic understanding of stochastic resonance driven by spin-transfertorque
• Spin transfer torque oscillator based on asymmetric magnetic tunnel junctions
• Spin-transfer-torque resonant switching and injection locking in presence of a weak external microwave field for spin valves with perpendicular materials
• Direct experimental measurement of phase-amplitude coupling in spin torque oscillators
• Micromagnetic study of a spin-torque oscillator based on a magnetic nano-contact magnetized at an arbitrary angle
• Spin-Torque-Induced Rotational Dynamics of a Magnetic Vortex Dipole
• Measurement of nonlinear frequency shift coefficient in spin-torque oscillators based on MgO tunnel junctions
• Large amplitude microwave emission and reduced nonlinear phase noise in Co2Fe(Ge0.5Ga0.5) Heusler alloy based pseudo spin valve nanopillars
• Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields
• Auto-oscillation threshold, narrow spectral lines, and line jitter in spin-torque oscillators based on MgO magnetic tunnel junctions
• Temperature dependence of microwave voltage emission associated to spin-transfer induced vortex oscillation in magnetic tunnel junction
• Time domain study of frequency-power correlation in spin-torque oscillators
• Non-Adlerian phase slip and non stationary synchronization of spin-torque oscillators to a microwave source
• Magnetization switching driven by spin-transfer-torque in high-TMR magnetic tunnel junctions
• Frequency generation by a magnetic vortex-antivortex dipole in spin-polarized current

Cited by in corpus (32)

• Spin torque nano-oscillators based on antiferromagnetic skyrmions
• Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale
• Topological insulators and semimetals in classical magnetic systems
• Micromagnetic modeling of Terahertz oscillations in an antiferromagnetic material driven by spin-Hall effect
• Strain-tunable Dzyaloshinskii--Moriya interaction and skyrmions in two-dimensional Janus Cr${}_2$X${}_3$Y${}_3$ (X, Y = Cl, Br, I, X $\ne$ Y) trihalide monolayers
• Spin-Hall Nano-oscillator: a micromagnetic study
• Frequency shift keying by current modulation in a MTJ-based STNO with high data rate
• Evaluating spintronics-compatible implementations of Ising machines
• Influence of the Dzyaloshinskii-Moriya interaction on the spin-torque diode effect
• Ultra-low-energy computing paradigm using giant spin Hall devices
• Dynamical properties of three terminal magnetic tunnel junctions: spintronics meets spin-orbitronics
• Intrinsic synchronization of an array of spin-torque oscillators driven by the spin-Hall effect
• Scalable synchronization of spin-Hall oscillators in out-of-plane field
• Low frequency non-resonant rectification in spin-diodes
• Electrical generation and detection of terahertz signal based on spin-wave emission from ferrimagnets
• Field-free high-frequency exchange-spring spin-torque nano-oscillators
• Elongated Skyrmion as Spin Torque Nano-Oscillator and Magnonic Waveguide
• Hybrid Magnonic-Oscillator System
• Voltage-input spintronic oscillator based on competing effect for extended oscillation regions
• Theory of nonreciprocal spin waves excitation in spin-Hall oscillators with Dzyaloshinkii-Moriya interaction
• Phase locking of spin transfer nano-oscillators using common microwave sources
• Realizing Corner States in Artificial Crystals Based on Topological Spin Textures
• High Frequency Microwave Emission of a Tri-layer Magnetic Tunnel Junction in the Absence of External Bias-Magnetic Field
• Dynamical systems study in single-phase multiferroic materials
• Non-uniform Superlattice Magnetic Tunnel Junctions
• Quantitative and realistic description of the magnetic potential energy of spin-torque vortex oscillators
• Spin-torque switching and control using chirped oscillating currents
• Layer-selective detection of magnetization directions from two layers of antiferromagnetically-coupled magnetizations by ferromagnetic resonance using a spin-torque oscillator
• MgO thickness-induced spin reorientation transition in Co0.9Fe0.1/MgO/Co0.9Fe0.1 structure
• Nonlinear spin dynamics of ferromagnetic ring in the vortex state and its application for spin-transfer nano-oscillator
• Magnetic oscillations Excited by Concurrent Spin Injection from a Tunneling Current and a Spin Hall Current
• Terahertz Spin Transfer Torque Oscillator Based on a Synthetic Antiferromagnet