Time resolved relaxation of nanomagnet

Time-resolved magnetic relaxation of a nanomagnet on subnanosecond time scales.
H. Liu, D. Bedau, J. Z. Sun, S. Mangin, E. E. Fullerton, J. A. Katine, and A. D. Kent
Phys. Rev. B 85, 220405 (2012)

(a) The total switching probability P_AP→P^double as a function of the second-pulse duration t₂ for a current I₁ of 8.5 mA and different delays. The dashed line is the switching probability P_AP→P⁽²⁾ for a single 8.5 mA pulse of duration t₂. (b) The same data are plotted with shifted time axis, with the shift dependent on the delay δt(t_delay). The data closely overlap, showing that the switching probability of a double pulse (t₁+t_delay+t₂) is the same as that of a single pulse with a longer duration, i.e., t₂+δt(t_delay), as illustrated schematically by the pulses drawn within the figure.