Combined frequency-amplitude nonlinear modulation: theory and applications

Abstract

In this work we formulate a generalized theoretical model to describe the nonlinear dynamics observed in combined frequency-amplitude modulators whose characteristic parameters exhibit a nonlinear dependence on the input modulating signal. The derived analytical solution may give a satisfactory explanation of recent laboratory observations on magnetic spin-transfer oscillators and fully agrees with results of micromagnetic calculations. Since the theory has been developed independently of the mechanism causing the nonlinearities, it may encompass the description of modulation processes of any physical nature, a promising feature for potential applications in the field of communication systems.

8 pages, 4 figures, to be published on IEEE Transactions on Magnetics

References in corpus (9)

• Bias-driven large power microwave emission from MgO-based tunnel magnetoresistance devices
• Spin-Torque Driven Magnetization Dynamics: Micromagnetic Modelling
• Frequency Modulation of Spin-Transfer Oscillators
• Coupling efficiency for phase locking of a spin transfer oscillator to a microwave current
• Non-linear frequency and amplitude modulation of a nano-contact spin torque oscillator
• Micromagnetic simulations of the magnetization precession induced by a spin polarized current in a point contact geometry
• Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques
• Excitation of self-localized spin-wave "bullets" by spin-polarized current in in-plane magnetized magnetic nano-contacts: a micromagnetic study
• Micromagnetic study of a spin-torque oscillator based on a magnetic nano-contact magnetized at an arbitrary angle

Cited by in corpus (9)

• Micromagnetic understanding of stochastic resonance driven by spin-transfertorque
• Spin-torque oscillator linewidth narrowing under current modulation
• Spin-transfer-torque resonant switching and injection locking in presence of a weak external microwave field for spin valves with perpendicular materials
• Frequency modulation of spin torque oscillator pairs
• Spin wave excitation patterns generated by spin torque oscillators
• Non-Adlerian phase slip and non stationary synchronization of spin-torque oscillators to a microwave source
• Modulation and phase-locking in nanocontact vortex oscillators
• Multiple modes of a single spin torque oscillator under the non-linear region
• Injection locking of multiple auto-oscillation modes in a tapered nanowire spin Hall oscillator