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Ferromagnetic materials, colloidal

Bitter pattern A microscopic pattern that forms on the surface of a ferromagnetic material that has been coated with a colloidal suspension of small iron particles. The patterns outline the boundaries of the magnetic domains (see magnetism). They were first observed by F. Bitter in 1931. [Pg.97]

As already described, a magnetic fluid is a stable colloidal dispersion of solid ferromagnetic particles with subdomain sizes in a dispersant. The concentration of particles in a dispersant can be as high as 10 /m. Historically, materials similar to magnetic fluids were prepared by dispersing a ferromagnetic powder, such as iron carbonyl, with diameters (d) of... [Pg.787]

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Ferromagnetic colloids

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Ferromagnetism

Material ferromagnets

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