Title :
Micromagnetics of surface segregation regions in domains written in TbFeCo alloys [magneto-optical media]
Author :
Scheinfein, M.R. ; Blue, James L. ; Aeschlimann, M.
Author_Institution :
Center for Solid State Sci., Arizona State Univ., Tempe, AZ, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
Domains written in thin films of TbFeCo were observed with scanning electron microscopy with polarization analysis (SEMPA). The SEMPA measurements revealed that the rare-earth concentration has a direct effect on the orientation of the surface magnetization which is tilted with respect to the sample normal due to segregation and oxidation processes. The magnetic microstructure of domains in thermal equilibrium was modeled by solving the Landau-Lifshitz-Gilbert equations. The proposed simple model of the surface has a thin layer of Fe-rich material near the surface with magnetic properties different from those in bulk. The surface micromagnetic properties are examined for various surface layer thicknesses and magnetic parameters
Keywords :
cobalt alloys; ferrimagnetic properties of substances; iron alloys; magnetic domains; magnetic properties of amorphous substances; magnetic surface phenomena; magnetic thin films; magneto-optical recording; scanning electron microscope examination of materials; surface segregation; terbium alloys; Landau-Lifshitz-Gilbert equations; SEM with polarisation analysis; TbFeCo alloys; domains in thermal equilibrium; magnetic microstructure; magneto-optical storage media; orientation; surface layer thicknesses; surface magnetization; surface micromagnetic properties; surface segregation regions; thin films; Equations; Magnetic analysis; Magnetic materials; Magnetic properties; Magnetization; Micromagnetics; Oxidation; Polarization; Scanning electron microscopy; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
