Switching spin valves using r.f. currents

Abstract

We show that magnetization reversal in spin-injection devices can be significantly faster when using a chirped r.f. rather than d.c current pulse. Alternatively one can use a simple sinusoidal r.f. pulse or an optimized series of alternating, equal-amplitude, square pulses of varying width (a digitized approximation to a chirped r.f. pulse) to produce switching using much smaller currents than with a d.c. pulse.

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References in corpus (7)

• Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
• Mechanisms of spin-polarized current-driven magnetization switching
• Finite-element theory of transport in ferromagnet-normal metal systems
• Switching of magnetization by non-linear resonance studied in single nanoparticles
• Magnetization dynamics with a spin-transfer torque
• Spin-Transfer Excitations of Permalloy Nanopillars for Large Applied Currents
• Controlling the Suhl instability: a numerical study

Cited by in corpus (6)

• Magnetoresistance and spin-transfer torque in magnetic tunnel junctions
• Resonant Spin-Transfer-Driven Switching of Magnetic Devices Assisted by Microwave Current Pulses
• Coherent control of nanomagnet dynamics via ultrafast spin torque pulses
• Parameter dependence of resonant spin torque magnetization reversal
• Parametric instability of a magnetic junction under modulated spin-polarized current
• Spin-transfer torque effects in the dynamic forced response of the magnetization of nanoscale ferromagnets in superimposed ac and dc bias fields in the presence of thermal agitation