Nonlinear behavior and mode coupling in spin transfer nano-oscillators

Abstract

By investigating thoroughly the tunable behavior of coupled modes, we highlight how it provides new means to handle the properties of spin transfer nano-oscillators. We first demonstrate that the main features of the microwave signal associated with coupled vortex dynamics i.e. frequency, spectral coherence, critical current, mode localization, depends drastically on the relative vortex core polarities. Secondly we report a large reduction of the nonlinear linewidth broadening obtained by changing the effective damping through the control of the core configuration. Such a level of control on the nonlinear behavior reinforces our choice to exploit the microwave properties of collective modes for applications of spintronic devices in novel generation of integrated telecommunication devices.

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• Origin of spectral purity and tuning sensitivity in a vortex-based spin transfer nano-oscillator
• Direct experimental measurement of phase-amplitude coupling in spin torque oscillators
• Generation linewidth of mode-hopping spin torque oscillators
• Time Domain Mapping of Spin Torque Oscillator Effective Energy
• A quasi-linear spin-torque nano-oscillator via enhanced negative feedback of power fluctuations

Cited by in corpus (20)

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• Optimizing magneto-dipolar interactions for synchronizing vortex based spin-torque nano-oscillators
• Localized magnetic fields enhance the field-sensitivity of the gyrotropic resonance frequency of a magnetic vortex
• Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics
• Resonant pinning spectroscopy with spin-vortex pairs
• Stable oscillation in spin torque oscillator excited by a small in-plane magnetic field
• Phase locking of spin transfer nano-oscillators using common microwave sources
• Frequency-based nanoparticle sensing over large field ranges using the ferromagnetic resonances of a magnetic nanodisc
• Exchange-mediated, non-linear, out-of-plane magnetic field dependence of the ferromagnetic vortex gyrotropic mode frequency driven by core deformation
• Influence of interlayer coupling on the spin torque driven excitations in a spin torque oscillator
• Parametric resonance of spin waves in ferromagnetic nanowires tuned by spin Hall torque
• Transient dynamics of strongly coupled spin vortex pairs: effects of anharmonicity and resonant excitation on inertial switching
• Driven energy transfer between coupled modes in spin-torque oscillators
• Static and dynamic properties of vortex pairs in asymmetric nanomagnets
• Surface anisotropy in a magnetic cylinder induced by the displacement of a vortex core
• Nanocontact vortex oscillators based on Co${}_2$MnGe pseudo-spin valves
• Effects of asymmetry in strongly coupled spin vortex pairs
• Asymmetric angular dependence of spin-transfer torques in CoFe/Mg-B-O/CoFe magnetic tunnel junctions