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

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

   Thousands of sets of high-powered magnetic balls sold at Walmart have been recalled after federal regulators issued a warning about the potential risk of choking, serious injuries and death ...

3. Neodymium magnet - Wikipedia

   en.wikipedia.org/wiki/Neodymium_magnet

   Neodymium magnet

4. 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 ...

5. Superconducting magnet - Wikipedia

   en.wikipedia.org/wiki/Superconducting_magnet

   A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire has no electrical resistance and therefore can conduct much larger electric currents than ordinary wire, creating intense magnetic fields.

6. Rare-earth element - Wikipedia

   en.wikipedia.org/wiki/Rare-earth_element

   Rare-earth element

7. Neodymium - Wikipedia

   en.wikipedia.org/wiki/Neodymium

   Neodymium - Wikipedia ... Neodymium