Title :
Magnetization curve for iron-nitride fine particle system with random anisotropy
Author :
Mamiya, H. ; Nakatani, I.
Author_Institution :
Nat. Res. Inst. for Metals, Tsukuba, Japan
fDate :
7/1/1998 12:00:00 AM
Abstract :
Magnetization curves were measured for a frozen iron-nitride magnetic fluid with uniform particles. The results are compared with calculated curves for the single domain particles with randomly oriented uniaxial easy axes. It is clarified that the magnetization curve for isolated particles shows appreciable deviation from the superparamagnetic superposition in a wide range of temperature above the blocking temperature. This deviation can be attributed to the anisotropy energy on each particle
Keywords :
ferromagnetic materials; iron compounds; magnetic anisotropy; magnetic domains; magnetic fluids; magnetic particles; magnetisation; superparamagnetism; FeN; anisotropy energy; blocking temperature; frozen iron-nitride magnetic fluid; iron-nitride fine particle system; isolated particles; magnetization curve; random anisotropy; randomly oriented uniaxial easy axes; single domain particles; superparamagnetic superposition; uniform particles; Anisotropic magnetoresistance; Equations; Magnetic liquids; Magnetic moments; Magnetization; Particle measurements; Shape; Temperature dependence; Temperature distribution; Time measurement;
Journal_Title :
Magnetics, IEEE Transactions on
