Using magnetic force microscopy and micromagnetic simulations, we studied the effect of Oersted magnetic fields on the chirality of transverse magnetic domain walls in Fe20Ni80/Ir bilayer nanostrips. Applying nanosecond current pulses with a current density of around 2×1012 A/m2, the chirality of a transverse domain wall could be switched reversibly and reproducibly. These current densities are similar to the ones used for current-induced domain wall motion, indicating that the Oersted field may stabilize the transverse wall chirality during current pulses and prevent domain wall transformations.
@article{arxiv.1312.4918,
title = {Manipulating domain wall chirality by current pulses in Permalloy/Ir nanostrips},
author = {Zahid Ishaque and Van Dai Nguyen and Olivier Fruchart and Stefania Pizzini and Nicolas Rougemaille and Svenja Perl and Jean-Christophe Toussaint and Jan Vogel},
journal= {arXiv preprint arXiv:1312.4918},
year = {2013}
}