Title :
Reversal dynamics of interacting circular nanomagnets
Author :
Suess, Dieter ; Schrefl, Thomas ; Fidler, Josef ; Tsiantos, Vasillios
Author_Institution :
Inst. of Appl. & Tech. Phys., Wien Univ. of Technol., Austria
fDate :
7/1/2001 12:00:00 AM
Abstract :
The Gilbert equation of motion is solved to investigate the reversal dynamics of interacting circular NiFe nanoelements. During magnetization reversal of isolated circular nanomagnets, inhomogeneous transient states are formed. The exchange energy of the intermediates states, which is a measure for the uniformity of the magnetization, increases with decreasing Gilbert damping constant or increasing applied field. The magnetostatic interactions lead to a further enhancement of the nonuniformity during reversal of interacting nanomagnets
Keywords :
Newton method; Permalloy; ferromagnetic materials; finite element analysis; magnetic domain walls; magnetic switching; magnetisation reversal; nanostructured materials; FEM model; Gilbert damping constant; Gilbert equation of motion; Newton method; NiFe; Permalloy; exchange energy; inhomogeneous transient states; interacting circular nanomagnets; irreversible switching; magnetisation reversal dynamics; magnetisation uniformity; magnetostatic interactions; micromagnetics; nanodots; nonuniformity enhancement; Damping; Equations; Magnetic anisotropy; Magnetic domains; Magnetic field measurement; Magnetization; Magnetostatics; Magnets; Micromagnetics; Perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
