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2. Rare-earth magnet - Wikipedia

   en.wikipedia.org/wiki/Rare-earth_magnet

   Ferrofluid on glass, with a rare-earth magnet underneath. A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements.Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets.

3. Alnico - Wikipedia

   en.wikipedia.org/wiki/Alnico

   Alnico alloys can be magnetised to produce strong magnetic fields and have a high coercivity (resistance to demagnetization), thus making strong permanent magnets. Of the more commonly available magnets, only rare-earth magnets such as neodymium and samarium-cobalt are stronger.

4. Neodymium magnet - Wikipedia

   en.wikipedia.org/wiki/Neodymium_magnet

   Ring magnets Most hard disk drives incorporate strong magnets This manually-powered flashlight uses a neodymium magnet to generate electricity Neodymium magnets have replaced alnico and ferrite magnets in many of the myriad applications in modern technology where strong permanent magnets are required, because their greater strength allows the ...

5. Samarium–cobalt magnet - Wikipedia

   en.wikipedia.org/wiki/Samarium–cobalt_magnet

   A samarium–cobalt (SmCo) magnet, a type of rare-earth magnet, is a strong permanent magnet made of two basic elements: samarium and cobalt.. They were developed in the early 1960s based on work done by Karl Strnat at Wright-Patterson Air Force Base and Alden Ray at the University of Dayton.

6. Magnet - Wikipedia

   en.wikipedia.org/wiki/Magnet

   A magnet's magnetic moment (also called magnetic dipole moment and usually denoted μ) is a vector that characterizes the magnet's overall magnetic properties. For a bar magnet, the direction of the magnetic moment points from the magnet's south pole to its north pole, [ 15 ] and the magnitude relates to how strong and how far apart these poles ...

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8. Ferromagnetism - Wikipedia

   en.wikipedia.org/wiki/Ferromagnetism

   Permanent magnets are made from hard ferromagnetic materials (such as alnico) and ferrimagnetic materials (such as ferrite) that are subjected to special processing in a strong magnetic field during manufacturing to align their internal microcrystalline structure, making them difficult to demagnetize. To demagnetize a saturated magnet, a ...

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   If you love Scrabble, you'll love the wonderful word game fun of Just Words. Play Just Words free online!