Title :
Domain wall structures and dynamics in thin films
Author :
Yuan, Samuel W. ; Bertram, H. Neal
Author_Institution :
Center for Magnetic Recording Res., California Univ., San Diego, CA, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
Computer simulation is used to study two-dimensional domain wall structures and dynamics in Permalloy thin films with easy axis parallel to the film plane. The effective wall mass and the viscosity coefficient are found to be one or two orders of magnitude greater than for one-dimensional bulk material. For external easy axis fields much larger than the anisotropy field, the wall motion exhibits turbulent behavior with vortex breakdown as a precursor, with an increasing hard axis field, the wall configuration changes from an asymmetric Bloch wall to a Neel wall
Keywords :
Permalloy; magnetic domain walls; magnetic thin films; physics computing; Neel wall; Permalloy thin films; anisotropy field; asymmetric Bloch wall; computer simulation; easy axis fields; effective wall mass; hard axis field; turbulent behavior; two-dimensional domain wall structures; viscosity coefficient; vortex breakdown; wall configuration; wall motion; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic domain walls; Magnetic films; Magnetic flux; Magnetostatics; Perpendicular magnetic anisotropy; Saturation magnetization; Transistors; Viscosity;
Journal_Title :
Magnetics, IEEE Transactions on
