We used numerical simulations to study the dynamical behavior of the transverse domain wall (TDW) in nanowires made of Permalloy-79 contaminated by pointlike magnetic impurities. It was observed that the magnetic impurities can behave both as pinning (attractive) and as scattering (repulsive) sites for the TDW. We have found that the nearer to the bottom edge of the nanowire is located the magnetic impurity, the larger is the magnitude of the pinning and the scattering energy, which agrees with experimental observation. We also observed that the interaction energy and the range of the interaction potential depend on the width of the nanowire. The presence of magnetic impurity affects the motion of the TDW.
We have performed numerical simulations to demonstrate that the domain wall movement can be controlled introducing a distribution of magnetic impurities in a nanowire. In particular, we have considered two identical impurities equidistant from the nanowire width axis. Pinning and scattering sites for the domain wall can be defined by magnetic impurities, consisting of a local variation of the exchange constant. The domain wall motion was induced by application of a magnetic field pulse and our results indicate that it is possible to control the domain wall position.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.