Manipulating the magnetization direction of transverse domain walls in Permalloy/Ir strips using nanosecond current pulses

Abstract

Manipulating the magnetization direction of transverse domain walls in Permalloy/Ir strips using nanosecond current pulses, Journal of Magnetism and Magnetic Materials, http://dx. AbstractUsing magnetic force microscopy and micromagnetic simulations, we studied the effect of Oersted magnetic fields on transverse magnetic domain walls in Fe 20 Ni 80 /Ir bilayer nanostrips. Applying nanosecond current pulses with a current density of around 2 × 10 12 A/m 2 , the magnetization direction of a transverse domain wall in the Fe 20 Ni 80 -layer could be switched reversibly and reproducibly. This suggests that in bi-and trilayer strips the Oersted field stabilizes the transverse wall magnetization direction during current-induced domain wall motion and prevents domain wall transformations.