Ferromagnetic
Iron, cobalt, nickel, and various alloys of these materials are called ferromagnetic. Ferromagnetic materials can be permanently magnetized through exposure to an external magnetic field...
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Ferromagnetism
Ferromagnetism is the effect that creates permanently magnetized materials, such as ordinary horseshoe magnets. Although the effect is most common in pure iron, it can also be reproduce...
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Ferromagnetic
Ferromagnetism