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General Motors has entered into a partnership with a small Wisconsin start-up, Niron Magnetics, to develop electric motor magnets that can be made without rare elements that are mostly sourced ...
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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. [11] MP Materials is listed on the New York Stock Exchange under the ticker symbol ...
An electropermanent magnet or EPM is a type of permanent magnet in which the external magnetic field can be switched on or off by a pulse of electric current in a wire winding around part of the magnet. The magnet consists of two sections, one of "hard" (high coercivity) magnetic material and one of "soft" (low coercivity) material. The ...
The saturation remanence and coercivity are figures of merit for hard magnets, although maximum energy product is also commonly quoted. The 1980s saw the development of rare-earth magnets with high energy products but undesirably low Curie temperatures. Since the 1990s new exchange spring hard magnets with high coercivities have been developed ...
Mu-metal is used to shield equipment from magnetic fields. For example: Electric power transformers, which are built with mu-metal shells to prevent them from affecting nearby circuitry. Hard disks, which have mu-metal backings to the magnets found in the drive to keep the magnetic field away from the disk. [6]
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 on the alloy composition, microstructure, and manufacturing technique employed.