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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. Neodymium magnet - Wikipedia

   en.wikipedia.org/wiki/Neodymium_magnet

   Inventor Masato Sagawa demonstrating a NdFeB magnet's force with 2 kg bottle. A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd 2 Fe 14 B tetragonal crystalline structure. [1] They are the most widely used type of rare-earth magnet.

4. Neodymium - Wikipedia

   en.wikipedia.org/wiki/Neodymium

   Neodymium. double hexagonal close-packed (dhcp) (hP4) Neodymium is a chemical element; it has symbol Nd and atomic number 60. It is the fourth member of the lanthanide series and is considered to be one of the rare-earth metals. It is a hard, slightly malleable, silvery metal that quickly tarnishes in air and moisture.

5. Rare-earth magnet - Wikipedia

   en.wikipedia.org/wiki/Rare-earth_magnet

   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. The magnetic field typically produced by rare-earth ...

6. MP Materials - Wikipedia

   en.wikipedia.org/wiki/MP_Materials

   MP Materials focuses its production on Neodymium-Praseodymium (NdPr), a rare earth material used in high-strength permanent magnets that power the traction motors found in electric vehicles, robotics, wind turbines, drones and other advanced motion technologies. [12] MP Materials is listed on the New York Stock Exchange under the ticker symbol ...

7. Force between magnets - Wikipedia

   en.wikipedia.org/wiki/Force_between_magnets

   r {\displaystyle r} is the distance between the magnetic dipole axes of the two magnets. With their magnetic dipole aligned, the force can be computed analytically using elliptic integrals. [ 7 ] This can be rewritten as, Where is the magnetization of the magnets and is the distance between them.