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Horseshoe magnet holds metallic dust

Horseshoe magnet holds metallic dust

A230/0047

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Credit

ADRIENNE HART-DAVIS / SCIENCE PHOTO LIBRARY ADRIENNE HART-DAVIS / SCIENCE PHOTO LIBRARY

Caption

A horseshoe magnet holding some metallic dust. Magnetic objects are mainly composed of ferromagnetic elements such as iron, cobalt and nickel. They have the capability to retain a certain amount of magnetization once exposed to an external magnetic field. This phenomenon is explained by the presence of "domains" in the crystalline structure of these metals. They are small regions, 1-0. When an external field is applied all the domains are lined up with the field providing the high magnetization.

Release details

Model release not required. Property release not required.

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