DocumentCode :
1030150
Title :
Effects of "Chain-of-Spheres" configurations on magnetic properties for fine α-Fe. particles. II. Study on intergrain-misfitting effect
Author :
Ohshima, Kz.
Author_Institution :
Mitsui-Toatsu Chemicals Inc., Yokohama-City, Japan
Volume :
23
Issue :
5
fYear :
1987
fDate :
9/1/1987 12:00:00 AM
Firstpage :
2826
Lastpage :
2828
Abstract :
For fine α-Fe particles prepared from acicular α-FeOOH.particles industrially, intergrain-misfitting effects (taken as a concept of "crystalline-defects") were numerically studied by a "Chain-of-Spheres" Fanning-Model[:CSFM]. CSFM is based on an "interaction-anisotropy" developed by Jacobs and Bean and modified recently by the author to apply to various types of particle-morphology. Theoretical results are compared with experiments. It is shown that the introduction of "crystalline-defects" into the theory provides linear decreasing of coercivity for the chain aligned along an external field and its smooth angular-variation. This trend explains the experimentally-observed behaviour for very fine α-Fe.particles. An application of the model theory for multigrain-type particles is discussed and compared with experimental results.
Keywords :
Magnetic recording; Chemicals; Crystallization; Crystallography; Iron alloys; Jacobian matrices; Magnetic anisotropy; Magnetic properties; Perpendicular magnetic anisotropy; Surface morphology; Temperature;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1987.1065564
Filename :
1065564
Link To Document :
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