Permanent magnets are highly demanded in modern times. The strongest of all permanent magnet options are rare earth magnets. Their magnet field is very powerful, about 1.4 Tesla, while that of ferrite magnets ranges between 0.5 and 1 Tesla. That’s why rare-earth magnet styles, commonly called neodymium magnets, are said to have a permanent magnetic
ferromagnetic metal oxide Archives | Stanford Magnets
January 2, 2019