Title :
Temperature dependence of anisotropy field in Co-Ti substituted Ba-ferrite particles
Author :
Kishimoto, Mikio ; Kitahata, Shin-ichi
Author_Institution :
Hitachi Maxwell Ltd., Kyoto, Japan
fDate :
9/1/1989 12:00:00 AM
Abstract :
Co-Ti substituted Ba-ferrite particles were prepared, and the crystalline and shape anisotropy energies were measured in the temperature range of 78 K to 400 K to determine the crystalline anisotropy field of the particles. The crystalline anisotropy energy and the crystalline anisotropy field at room temperature were about 0.67×106 erg/cm3 and about 4700 Oe, respectively. A similar temperature dependence was observed between the effective anisotropy field and the coercivity. This and a high intrinsic coercivity indicate coherent rotation of the magnetic moment in single-domain particles
Keywords :
barium compounds; cobalt compounds; coercive force; ferrites; magnetic anisotropy; magnetic properties of fine particles; titanium compounds; 78 to 400 K; BaCo0.8Ti0.8Fe10.4O19; coercivity; coherent rotation; crystalline anisotropy energy; crystalline anisotropy field; ferrite; magnetic moment; shape anisotropy energies; single-domain particles; temperature dependence; Anisotropic magnetoresistance; Coercive force; Crystallization; Energy measurement; Magnetic field measurement; Particle measurements; Shape measurement; Temperature dependence; Temperature distribution; Temperature measurement;
Journal_Title :
Magnetics, IEEE Transactions on
