DocumentCode :
1487754
Title :
Magnetic remanence properties of particulate recording media: comparison of barium ferrite with acicular materials
Author :
Sharrock, M.P.
Author_Institution :
Memory Technol. Group Lab., 3M Center, St. Paul, MN, USA
Volume :
24
Issue :
6
fYear :
1988
fDate :
11/1/1988 12:00:00 AM
Firstpage :
2856
Lastpage :
2858
Abstract :
The magnetic remanence properties of barium ferrite particulate media were studied and compared with those of acicular particulate materials to understand better the differences in recording properties. The loss of remanence after the application and removal of an applied magnetic field was measured for fields opposite and transverse to the direction of initial magnetization. The loss of remanence after application of a reverse field gives information about the distribution of switching fields; this distribution is narrower in barium ferrite than in acicular materials. The loss of remanence after the application of transverse fields gives information about the magnetic anisotropy; barium ferrite is much more resistant to demagnetization by transverse fields than are acicular materials, but only in oriented media. All results are analyzed in terms of their dependence on relevant magnetic squareness parameters to account for the differing degrees of particle orientation in the samples and thus to observer fundamental differences in material properties
Keywords :
barium compounds; ferrimagnetic properties of substances; ferrites; iron compounds; magnetic anisotropy; magnetic properties of fine particles; magnetic recording; remanence; BaFe12O19; acicular materials; acicular particulate materials; distribution of switching fields; loss of remanence; magnetic anisotropy; magnetic materials; magnetic recording; magnetic remanence properties; magnetic squareness parameters; material properties; oriented media; particle orientation; particulate media; particulate recording media; recording properties; resistant to demagnetization; reverse field; transverse fields; Barium; Ferrites; Loss measurement; Magnetic anisotropy; Magnetic field measurement; Magnetic materials; Magnetic properties; Magnetic recording; Perpendicular magnetic anisotropy; Remanence;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.92267
Filename :
92267
Link To Document :
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