Title :
Magnetic viscosity measurements on an isolated single domain particle
Author :
Richter, H.J. ; Hempel, K.A.
Author_Institution :
Inst. fuer Werkstoffe der Elektrotech., Aachen Univ. of Technol., West Germany
fDate :
9/1/1989 12:00:00 AM
Abstract :
Measurements of the waiting time for the magnetization jump to occur in an isolated single-domain particle as a function of the applied field are reported. The investigations were performed on a single crystal of barium ferrite of about 2.5-μm size. The data are analyzed using the theory of thermally activated processes. It is found that the activation volume is considerably smaller than the volume of the whole particle
Keywords :
barium compounds; ferrites; magnetic domains; magnetic hysteresis; magnetic properties of fine particles; magnetisation reversal; 2.5 micron; BaFe12O19; activation volume; applied field; ferrite; isolated single domain particle; magnetic viscosity measurement; magnetisation reversal; magnetization jump; thermally activated processes; waiting time; Barium; Data analysis; Ferrites; Magnetic analysis; Magnetic domains; Magnetic field measurement; Magnetization; Particle measurements; Time measurement; Viscosity;
Journal_Title :
Magnetics, IEEE Transactions on
