Atomic-scale modeling of nanoconstrictions

Author

Mukherjee, Sonali ; Litvinov, Dmitri ; Khizroev, Sakhrat

Author_Institution

Seagate Res., Pittsburgh, PA, USA

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2143

Lastpage

2145

Abstract

Using a Heisenberg model along with Monte Carlo, it is demonstrated that localized domain walls can be formed inside nanoconstrictions. The origin of the localized domain wall lies in the competition between atomic-scale exchange and the shape anisotropy. This leads to high sensitivity of the domain wall width on the shape of the nanoconstriction. Moreover, it is shown that ferromagnetic ordering is considerably reduced in these localized domain walls.

Keywords

Heisenberg model; Monte Carlo methods; ferromagnetism; magnetic domain walls; nanostructured materials; scattering; spin dynamics; Heisenberg model; Monte Carlo; atomic-scale exchange; atomic-scale modeling; domain wall width; ferromagnetic ordering reduction; localized domain walls; nanoconstriction shape; nanoconstrictions; scattering; shape anisotropy; spin disorder; Anisotropic magnetoresistance; Electrons; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetostatics; Perpendicular magnetic anisotropy; Saturation magnetization; Scattering; Shape; Localized domain wall; nanoconstriction; scattering; spin disorder;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.830159

Filename

1325433