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Revision as of 23:58, 10 June 2003 by Stevenj (talk | contribs) (rephrasing for clarity)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)A ferromagnet is a piece of ferromagnetic material such as iron, in which the microscopic magnetized regions, called domains, have been aligned by an external magnetic field (e.g. from another permanent magnet or an electromagnet) so that the piece itself is a permanent magnet. The name derives from the Latin ferrum, meaning "iron" (the most well-known ferromagnetic material).