Eur. Phys. J. B (2014) 87: 188
https://doi.org/10.1140/epjb/e2014-41059-8

Regular Article

Metastable domain wall dynamics in magnetic nanowires

¹ Aix-Marseille University, 13397 Marseille, France
² IM2NP CNRS, Avenue Escadrille Normandie Niemen, 13397 Marseille, France

^a e-mail: voicu.dolocan@im2np.fr

Received: 6 December 2013
Received in final form: 17 March 2014
Published online: 11 August 2014

Abstract

We study the formation and control of metastable states of pairs of domain walls in cylindrical nanowires of small diameter where the transverse walls are the lower energy state. We show that these pairs form bound states under certain conditions, with a lifetime as long as 200 ns, and are stabilized by the influence of a spin polarized current. Their stability is analyzed with a model based on the magnetostatic interaction and by 3D micromagnetic simulations. The apparition of bound states could hinder the operation of devices.