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2. Magnetic balls sold at Walmart recalled due to risk of ...

   www.aol.com/news/magnetic-balls-sold-walmart...

   High-powered magnetic ball sets sold online at Walmart have been recalled after federal regulators warned about the ... The recalled balls contain high-powered neodymium "rare earth" magnets, 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. Neodymium magnet - Wikipedia

   en.wikipedia.org/wiki/Neodymium_magnet

   This magnetic energy value is about 18 times greater than "ordinary" ferrite magnets by volume and 12 times by mass. This magnetic energy property is higher in NdFeB alloys than in samarium cobalt (SmCo) magnets, which were the first type of rare-earth magnet to be commercialized. In practice, the magnetic properties of neodymium magnets depend ...

6. Ferromagnetism - Wikipedia

   en.wikipedia.org/wiki/Ferromagnetism

   A relatively new class of exceptionally strong ferromagnetic materials are the rare-earth magnets. They contain lanthanide elements that are known for their ability to carry large magnetic moments in well-localized f-orbitals.

7. Rare-earth element - Wikipedia

   en.wikipedia.org/wiki/Rare-earth_element

   Rare-earth magnets, lasers, core material for carbon arc lighting, colorant in glasses and enamels, additive in didymium glass used in welding goggles, [11] ferrocerium firesteel (flint) products, single-mode fiber optical amplifiers (as a dopant of fluoride glass) 9.2 60 Nd Neodymium: from the Greek "neos", meaning new, and "didymos", meaning ...