Title :
Micromagnetic simulation of non uniform nanodots with perpendicular anisotropy
Author :
Dao, N. ; Kikuchi, N. ; Abelmann, L. ; Lodder, J.C.
Author_Institution :
Syst. & Mater. for Inf. Storage, Twente Univ., Enschede, Netherlands
Abstract :
Multilayered Pt/[Co/Pt]5 films were fabricated into patterned dots with diameters of 120 and 200 nm by laser interference lithography. Anomalous Hall effect (AHE) measurements were used on an array of dots to measure the switching field and the effects of reversal of an area with reduced anisotropy in the dot were also investigated by micromagnetic simulation. It was shown that a reduction in switching field is caused by an area of reduced anisotropy. The effect of various combinations of a reduction in anisotropy and/or exchange constant, and the size and shape of the area were also discussed in this paper.
Keywords :
Hall effect; cobalt; ferromagnetic materials; magnetic multilayers; magnetic switching; magnetic thin films; magnetisation reversal; micromagnetics; nanostructured materials; perpendicular magnetic anisotropy; platinum; 120 nm; 200 nm; Pt-Co-Pt; anomalous Hall effect; exchange constant; laser interference lithography; micromagnetic simulation; multilayered films; nanodots; patterned dots; perpendicular anisotropy; reduced anisotropy; switching field; Anisotropic magnetoresistance; Area measurement; Magnetic domain walls; Magnetic field measurement; Magnetic films; Magnetic materials; Magnetization reversal; Material storage; Micromagnetics; Perpendicular magnetic recording;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464357
