Domain dynamics in Co/Pt/Co/Pt/Co/IrMn M. Czapkiewicz

New domain nucleation: N(t)=N 0 (1-exp(-Rt)) Fatuzzo: cylindric domains nucleation and growth B(t)= exp ( -2k 2 ( 1-(1 -(Rt+1/k) +0.5(Rt+1/k) 2 –e -Rt (1-1/k) –0.5k 2 (1-Rt) ) ) where k=v/Rr, v i R increase with z H, k const R=R 0 exp [ -(W N -2HM S V N )/k B T ] v=v 0 exp [ -(W P -2HM S V P )/k B T ]

k: real time

k: reduced time

#26 backward #26 forward

#26 backward #26 forward

#26 real time

#31 forward – without dead time correction

#31 forward – dead time correction

#31 forward – fit after dead time correction Kerr video: for H=21.1mT v=10 m/s

#31 forward – before dead time correction – impossible to fit

#31 backward – fit after dead time correction Kerr video: for H=7.8mT v=50 m/s