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Average and standard deviation of switching time as a function of current for various spin polarization factors, ; (a) average and (b) standard deviation (cell ). is the theoretical critical current for onset of magnetic excitations.
Delay in switching due to vortex formation. (a) Time-dependent variations of normalized magnetization for two different switching events at room temperature (, , and sample ), (b) spatial distributions of time averaged magnetic charges for a switching event without vortex [solid square of Fig. 2(a)], and (c) spatial distributions of for a switching event with vortex formation [open circle of Fig. 2(a)].
Average of switching time as a function of current. Constant cell area: (a) and (b) . Constant aspect ratio: (c) and (b) .
Probability of switching as a function of current. Constant cell area: (a) and (b) . Constant aspect ratio: (c) and (b) .
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