Fig. 3: Single-pulse reversal in Tb32Co68(4 nm)/Co(1.52 nm)/Tb32Co68(4 nm) trilayer.
From: In-plane reorientation induced single laser pulse magnetization reversal

a Background subtracted images after first and second pulses with 50 fs laser pulse with different fluences. b State diagram which is plotted by pulse duration as a function of fluences. TF1 is the border for switching; TF2 is the border to two domains state, one ring; TF3 is the border to three domains state, two rings; etc….TF7 is the border to the demagnetized state at the center. The dotted lines are guide for the eyes.