Current induced domain wall motion in nanostripes with perpendicular magnetic anisotropy

Abstract

We report micromagnetic modeling results of current induced domain wall (DW) motion in magnetic devices with perpendicular magnetic anisotropy by solving the Landau-Lifschitz-Gilbert equation including adiabatic and non-adiabatic terms. A nanostripe model system with dimensions of 500 nm (L)x25 nm (W)x5 nm (H) was selected for calculating the DW motion and its width, as a function of various parameters such as non-adiabatic contribution, anisotropy constant (K(u)), saturation magnetization (M(s)), and temperature (T). The DW velocity was found to increase when the values of K(u) and T were increased and the M(s) value decreased. In addition, a reduction of the domain wall width could be achieved by increasing K(u) and lowering M(s) values regardless of the non-adiabatic constant value. (C) 2010 Elsevier B.V. All rights reserved.