Influence of current on field-driven domain wall motion in permalloy nanowires from time resolved measurements of anisotropic magnetoresistance.
The motion of magnetic domain walls in permalloy nanowires is investigated by real-time resistance measurements. The domain wall velocity is measured as a function of the magnetic field in the presence of a current flowing through the nanowire. We show that the current can significantly increase or decrease the domain wall velocity, depending on its direction. These results are understood within a one-dimensional model of the domain wall dynamics which includes the spin transfer torque.
Hayashi
M
M
IBM Almaden Research Center, San Jose, California, USA.
Thomas
L
L
Bazaliy
Ya B
YB
Rettner
C
C
Moriya
R
R
Jiang
X
X
Parkin
S S P
SS