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2. 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 ...

3. 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.

4. 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.

5. Magnet - Wikipedia

   en.wikipedia.org/wiki/Magnet

   Ancient people learned about magnetism from lodestones (or magnetite) which are naturally magnetized pieces of iron ore.The word magnet was adopted in Middle English from Latin magnetum "lodestone", ultimately from Greek μαγνῆτις [λίθος] (magnētis [lithos]) [1] meaning "[stone] from Magnesia", [2] a place in Anatolia where lodestones were found (today Manisa in modern-day Turkey).

6. Do magnets affect credit cards? - AOL

   www.aol.com/finance/magnets-affect-credit-cards...

   Avoid storing your credit card near magnets or other magnetic items. If your purse or wallet has a magnet on it, ensure the magnetic strip on your card faces away from the magnet to help avoid damage.

7. Bitter electromagnet - Wikipedia

   en.wikipedia.org/wiki/Bitter_electromagnet

   The resistive magnet produces 33.5 T and the superconducting coil produces the remaining 11.5 T. The former magnet requires 30 MW of power, the latter must be kept at 1.8 K (−456.43 °F) using liquid helium, taking 6 weeks to cool. It costs $1452 per hour to run at full field.