Title :
Effects of nonuniform substitution on the reversal process of individual barium ferrite recording particles
Author :
Chang, Thomas ; Zhu, Jian-Gang
Author_Institution :
Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA
fDate :
11/1/1993 12:00:00 AM
Abstract :
Micromagnetic simulation is utilized to investigate the mechanism responsible for the sharp decrease with increasing particle size in the switching field observed from experimental measurements of isolated BaFe 12-x(CoTi)xO19 particles. Simulation results show that nucleation can occur at applied field values far below the intrinsic anisotropy field when the effect of nonuniform substitution of Co-Ti is considered
Keywords :
barium compounds; ferrites; magnetic properties of fine particles; magnetic recording; magnetisation reversal; particle size; BaFe12-x(CoTi)xO19; ferrite recording particles; intrinsic anisotropy field; micromagnetic simulation; nonuniform substitution; nucleation; particle size; reversal process; switching field; Anisotropic magnetoresistance; Barium; Ferrites; Force measurement; Magnetic field measurement; Magnetic force microscopy; Magnetic materials; Magnetization; Micromagnetics; Particle measurements;
Journal_Title :
Magnetics, IEEE Transactions on
