136
S. Krishnia and W. S. Lew
Fig. 30 a DWs velocity as a
function of current density
for two different DMI values
−0.5 mJ/m 2 (black) and −
1.2 mJ/m 2 (red).
b Normalized x and y
components of the DW
magnetization at 0.3 ns for
DMI (D) = −0.5 mJ/m 2
(solid lines) and −1.2 mJ/m 2
(dash lines)
Fig. 31 a DWs velocity as a function of current density b Normalized
hysteresis
loops
of
a
series
of
SAF
thin
films
formed
from
TaN(2)/Pt(1.5)/Co(0.3)/Ni(0.7)/Co(0.15)/Ru(t Ru )/Co(t a )/Ni(0.7)/Co(t b )/TaN(5), where t Ru =
0.2, t a = 0.15, t b = 0.15 (green squares), t Ru = 0.8, t a = 0.15, t b = 0.15 (red circles), t Ru = 0.8, t a
= 0.3, t b = 0.15 (violet triangles), t Ru = 0.8, t a = 0.3, t b = 0.3 (blur stars) [86]