Single-shot time-domain studies of spin-torque-driven switching in magnetic tunnel junctions
Cui, Y. -T. · Finocchio, G. · Wang, C. · Katine, J. A. · Buhrman, R. A. · Ralph, D. C.
Original · EN
We report single-shot measurements of resistance versus time for thermally assisted spin-torque-driven switching in magnetic tunnel junctions. We achieve sufficient sensitivity to resolve the resistance signals leading up to switching, including the variations between individual switching events. Analyses of pre-switching thermal fluctuations allow detailed measurements of coherence times and variations in magnetization precession amplitude. We find that with a small in-plane hard-axis magnetic field the magnetization dynamics are more spatially coherent than for the case of zero field.
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