1985•IEEE Translation Journal on Magnetics in JapanRequires access

A Coercivity Measuring Method of Barium Ferrote Fome Powder for Particulate Perpendicular Magnetic Recording Media

T. Ido, Osamu Kubo, H. Yokoyama

Abstract

A Barium ferrite platelet fine particle coercive force is affected by magnetic particle agglomeration. Investigations of a new measuring method to determine the intrinsic coercive force of Ba-ferrite particles that exclude the effect of magnetic agglomeration are reported. The new method was to make coercive force measurements for Ba-ferrite particles dispersed and attached on large SiO2particle surfaces. Coercive force measurement for samples of low Ba-ferrite/SiO2mixing ratio confirmed that it was possible to measure the intrinsic coercive force excluding the influence of magnetic agglomeration.

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Key concepts: Barium ferrite, Coercivity, Materials science, Ferrite (magnet), Economies of agglomeration, Barium, Analytical Chemistry (journal), Nuclear magnetic resonance