Generation of microwave radiation in planar spin-transfer devices

Abstract

Current induced precession states in spin-transfer devices are studied in the case of large easy plane anisotropy (present in most experimental setups). It is shown that the effective one-dimensional planar description provides a simple qualitative understanding of the emergence and evolution of such states. Switching boundaries are found analytically for the collinear device and the spin-flip transistor. The latter can generate microwave oscillations at zero external magnetic field without either special functional form of spin-transfer torque, or ``field-like'' terms, if Gilbert constant corresponds to the overdamped planar regime.

References in corpus (13)

• Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
• Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Non-collinear Magnetoelectronics
• Macrospin Models of Spin Transfer Dynamics
• Boltzmann Test of Slonczewski's Theory of Spin Transfer Torque
• Shaped angular dependence of the spin transfer torque and microwave generation without magnetic field
• Current Induced Magnetization Switching in Small Domains of Different Anisotropies
• Spin-transfer in diffusive ferromagnet-normal metal systems with spin-flip scattering
• Current-driven destabilization of both collinear configurations in asymmetric spin-valves
• Reducing the critical switching current in nanoscale spin valves
• Dynamics of thin-film spin-flip transistors with perpendicular source-drain magnetizations
• Current-controlled magnetization dynamics in the spin-flip transistor

Cited by in corpus (11)

• Spin Transfer Torques
• Averaged equation for energy diffusion on a graph reveals bifurcation diagram and thermally assisted reversal times in spin-torque driven nanomagnets
• Planar approximation for spin transfer systems with application to tilted polarizer devices
• Effective attraction induced by repulsive interaction in a spin-transfer system
• Planar approximation for the frequencies of spin transfer oscillators
• Phase dynamics of oscillating magnetizations coupled via spin pumping
• Uniform magnetization dynamics of a submicron ferromagnetic coin driven by the spin-orbit coupled spin torque
• Domain wall displacement by remote spin-current injection
• Domain wall dynamics for an in-plane magnetized thin film with large perpendicular hard axis anisotropy including Dzyaloshinskii-Moriya interaction
• Feedback voltage driven chaos in a three-terminal spin-torque oscillator
• Anomalous stabilization in a spin-transfer system at high spin polarization