Acicular magnetic particles
AssigneeOlin Corporation
InventorsJacob Crane, George J. Muench, Yousef Saleh
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Abstract
The present invention relates to a method for producing magnetic particles for use in recording media. The method comprises providing an alloy capable of forming a magnetic precipitate, aging the alloy to form a magnetic precipitate comprising a plurality of magnetic particles dispersed throughout a surrounding matrix; and dissolving the matrix to leave the magnetic particles. Magnetic particles produced by the present method are characterized by a size in the range of about 100 .ANG. to about 2000 .ANG., a single magnetic domain, an aspect ratio up to about 10:1, a relatively smooth surface, and a substantially uniform composition throughout.
Claims6
Free acicular magnetic particles characterized by a face-centered cubic structure, a length in the range of 100.ANG. to about 2000.ANG. and an aspect ratio up to about 10:1.
Dependencies are inferred from the claim text.