Title :
Effects of applied field inhomogeneities on the magnetization reversal of elongated γ-Fe2O3 particles
Author :
Schabes, Manfred E. ; Bertram, H. Neal
Author_Institution :
Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
A detailed micromagnetic study of the effects of nonuniform applied fields in elongated particles is given. As a representative case the magnetization reversal is studied in the presence of a recording head field. The investigation is restricted to an important subproblem: the single particle in an inhomogeneous applied field. This case is also interesting with regard to the development of ultrahigh-density recording systems. Reversible and irreversible magnetization processes are computed for the limit of small and large exchange coupling. Results are presented for both longitudinal and perpendicular media
Keywords :
iron compounds; magnetic heads; magnetic properties of fine particles; magnetic recording; magnetisation reversal; Fe2O3; applied field inhomogeneities; elongated particles; exchange coupling; irreversible magnetization; longitudinal media; magnetization reversal; micromagnetic study; nonuniform applied fields; perpendicular media; recording head field; reversible magnetization; ultrahigh-density recording systems; Anisotropic magnetoresistance; Couplings; Magnetic heads; Magnetic recording; Magnetization processes; Magnetization reversal; Mathematical model; Micromagnetics; Perpendicular magnetic recording; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
