Title :
Atomic-scale modeling of nanoconstrictions
Author :
Mukherjee, Sonali ; Litvinov, Dmitri ; Khizroev, Sakhrat
Author_Institution :
Seagate Res., Pittsburgh, PA, USA
fDate :
7/1/2004 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.830159