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3 Cards in this Set
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magnetic domains |
a portion of a ferromagnetic material where the magnetic moments are aligned with one another because of interactions between molecules or atoms .
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temporary magnets |
Every object that is lifted or moved by a magnet acts as a temporary magnet. Such an object ordinarily loses its magnetism when the permanent magnet is removed, although in certain cases it will retain weak magnetic properties.
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permanent magnet |
A lodestone is a naturally occurring permanent magnet composed of magnetite, an iron-bearing mineral. Such magnets have been known since ancient times. Virtually all magnets used commercially today are made from synthetic magnetic materials. The most common such materials are alnicos—iron alloys containing aluminum, nickel, and cobalt. Magnetic materials containing such rare-earth elements as samarium or neodymium form very strong permanent magnets. Ferrites, which consist of ferric oxide (an oxide of iron) combined with the oxides of one or more other metals, are widely used in electronic devices. Flexible magnets are made by combining magnetic materials with plastic
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