Title :
2D wall profiles in exchange coupled bilayers
Author :
Labrune, M. ; Miltat, J.
Author_Institution :
Univ. Paris-Sud, Orsay, France
fDate :
11/1/1993 12:00:00 AM
Abstract :
Two-dimensional wall configurations in exchange coupled bilayers are calculated using numerical micromagnetic simulations. Starting with a 180° domain arrangement in zero field, full saturation is, under hard axis field, only reached for field values large with respect to the anisotropy field, due to the nucleation of 360° walls. Their collapse field is computed versus the magnitude of the interlayer exchange coupling. A novel hysteresis mechanism, specifically for large coupling constants and involving superposed 360° walls, is described
Keywords :
Permalloy; exchange interactions (electron); ferromagnetic properties of substances; magnetic anisotropy; magnetic domain walls; magnetic hysteresis; magnetic multilayers; magnetic thin films; nucleation; numerical analysis; 2D wall profiles; NiFe; Permalloy; anisotropy field; collapse field; coupling constants; domain arrangement; exchange coupled bilayers; ferromagnetic coupling; hard axis field; hysteresis mechanism; interlayer exchange coupling; magnetic domain wall; nucleation; numerical micromagnetic simulations; two-dimensional wall configuration; Computational modeling; Couplings; Equations; Magnetic anisotropy; Magnetic separation; Magnetization; Magnetosphere; Magnetostatics; Micromagnetics; Perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
