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A U.K.-based company announced last week that they’d successfully developed, in just three months, a magnet that doesn’t use rare earth metals at all using AI—according to the company, that ...
The relatively low rare earth content (12% by volume, 26.7% by mass) and the relative abundance of neodymium and iron compared with samarium and cobalt makes neodymium magnets lower in price than the other major rare-earth magnet family, samarium–cobalt magnets.
Alnico alloys are ferromagnetic, and are used to make permanent magnets. Before the development of rare-earth magnets in the 1970s, they were the strongest permanent magnet type. Other trade names for alloys in this family are: Alni, Alcomax, Hycomax, Columax, and Ticonal. [2]
Permanent magnet degaussers use magnets made using rare earth materials. They do not require electricity for their operation. Permanent magnet degaussers require adequate shielding of the magnetic field they constantly have to prevent unintended degaussing. The need for shielding usually results in permanent magnet degaussers being bulky.
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Scientists have finally proved the existence of a new type of magnet, after previously believing it impossible.. The team that discovered the phenomenon, which is called altermagnetism, say it ...
Its rotor uses no permanent magnets and no rare earth minerals. The company claims that its motor provides power and efficiency comparable to permanent magnet synchronous motors, but at lower cost. The machine saves one watt-hour of electricity per kilometre (5%), because no permanent magnetic field brakes the rotor. [15]
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.