Collective Motions Assisted by Magnetostatic Interactions in Coupled Domain Wall System

Author

Purnama, I. ; Sekhar, M. Chandra ; Goolaup, S. ; Wen Siang Lew

Author_Institution

Sch. of Phys. & Math. Sci., Nanyang Technol. Univ., Singapore, Singapore

Volume

47

Issue

10

fYear

2011

Firstpage

3081

Lastpage

3084

Abstract

We have investigated the coupling between a transverse head-to-head domain wall and a transverse tail-to-tail domain wall in closely spaced Ni₈₀Fe₂₀ nanowires. Micromagnetic simulation shows that the two domain walls are coupled to each other. When spin-polarized current is applied to any of the nanowires, the two domain walls move in the same direction. The Walker breakdown limit in such system is shifted to higher current density. We have also observed that the coupling is broken for some combinations of initial magnetizations of the two domain walls.

Keywords

electron spin polarisation; ferromagnetic materials; iron alloys; magnetic domain walls; magnetisation; magnetostatic waves; micromagnetics; nanomagnetics; nanowires; nickel alloys; Ni₈₀Fe₂₀; Walker breakdown limit; collective motions; current density; ferromagnetic materials; magnetization; magnetostatic interactions; micromagnetic simulation; nanowires; spin-polarized current; transverse head-to-head domain wall coupling; transverse tail-to-tail domain wall coupling; Couplings; Current density; Electric breakdown; Magnetic domain walls; Magnetic domains; Magnetosphere; Nanowires; Domain wall; Walker breakdown; spin-polarized current;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2158635

Filename

6027799