Distribution of the magnetization reversal duration in sub-ns spin-transfer switching
arXiv:cond-mat/0609687 · doi:10.1103/PhysRevB.75.064402
Abstract
We study the distribution of switching times in spin-transfer switching induced by sub-ns current pulses in pillar-shaped spin-valves. The pulse durations leading to switching follow a comb-like distribution, multiply-peaked at a few most probable, regularly spaced switching durations. These durations reflect the precessional nature of the switching, which occurs through a fluctuating integer number of precession cycles. This can be modeled considering the thermal variance of the initial magnetization orientations and the occurrence of vanishing total torque in the possible magnetization trajectories. Biasing the spin-valve with a hard axis field prevents some of these occurrences, and can provide an almost perfect reproducibility of the switching duration.
arXiv commentsubmitted to PRB
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- Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques
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- Coherent control of nanomagnet dynamics via ultrafast spin torque pulses
- Spin-transfer-torque resonant switching and injection locking in presence of a weak external microwave field for spin valves with perpendicular materials
- Sub-ns spin-transfer switching: compared benefits of free layer biasing and pinned layer biasing
- Biased quasi ballistic spin torque magnetization reversal
- Spin-transfer torque induced reversal in magnetic domains
- Multiscale approach to spin transport in magnetic multilayers
- Spin-torque-induced magnetization dynamics in ferrimagnets based on Landau-Lifshitz-Bloch Equation
- Time-resolved imaging of pulse-induced magnetization reversal with a microwave assist field