Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2158635
