Title :
Fluctuation fields of reversal in oriented and non-oriented barium ferrite media
Author :
Patel, V. ; El-Hilo, M. ; O´Grady, K. ; Chantrell, R.W.
Author_Institution :
SEES, Univ. Coll. of North Wales, Bangor, UK
fDate :
11/1/1993 12:00:00 AM
Abstract :
Measurements of time dependent magnetization have been made on samples of partially oriented and nonoriented barium ferrite recording media. From these data and complementary measurements of the irreversible susceptibility, the variation of the fluctuation field Hf with applied field has been obtained. For the nonoriented sample the variation is quite broad whereas for the aligned case a rapid variation is found. These different types of behavior are attributed to the marked differences in the interaction configurations in the two samples. The interaction in the samples has been characterized via the delta I technique
Keywords :
barium compounds; ferrimagnetic properties of substances; ferrites; magnetic hysteresis; magnetic properties of fine particles; magnetic recording; magnetic susceptibility; magnetic tapes; magnetisation reversal; BaFe12O19; ferrite powder; fluctuation field reversal; interaction configurations; irreversible susceptibility; magnetic tape sample; nonoriented Ba ferrite recording media; partially oriented recording media; time dependent magnetization; Anisotropic magnetoresistance; Barium; Ferrites; Fluctuations; Magnetic anisotropy; Magnetic field measurement; Magnetic materials; Magnetic recording; Perpendicular magnetic anisotropy; Remanence;
Journal_Title :
Magnetics, IEEE Transactions on
