Title :
Nonequilibrium Magnetic Domain Structures as a Function of Speed of Switching Process in Ni 80Fe20 Thin-Film Element
Author :
Choi, B.C. ; Rudge, J. ; Freeman, M.R. ; Hong, Y.K. ; Xiao, Q.F.
Author_Institution :
Dept. of Phys. & Astron., Victoria Univ., BC
Abstract :
The influence of the speed of the switching process on the nonequilibrium domain structures in magnetic thin-film elements undergoing large angle rotations was studied with time-resolved scanning Kerr microscopy and numerical modelings. In particular, the systematic evolution of the spatiotemporal nature of the reversal of a small Ni80Fe20 element to progressively faster switching fields has been investigated. Generally, the magnetization evolves into a complex domain structure in nonequilibrium state when a magnetic element is excited by applying a short magnetic field pulse. The degree of complexity of the nonequilibrium domain structure is found to be a strong function of the speed of the switching process
Keywords :
Kerr magneto-optical effect; Permalloy; ferromagnetic materials; magnetic domains; magnetic switching; magnetic thin films; magnetisation reversal; metallic thin films; Ni80Fe20; large angle rotations; magnetic thin films; magnetization; nonequilibrium magnetic domain structures; numerical modeling; short magnetic field pulse; spatiotemporal magnetic switching speed; time resolved scanning Kerr microscopy; Astronomy; Magnetic confinement; Magnetic domains; Magnetic films; Magnetic force microscopy; Magnetic switching; Magnetization reversal; Physics; Saturation magnetization; Spatiotemporal phenomena; Magnetic domains; magnetization reversal; magnetooptic Kerr effect; simulation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.886845
