Magnets Rare Earth Produce Better Products

Magnets rare earth are of two major types. Lanthanide is a term in physics has a specific meaning and the term rare earth is also used to indicate materials of this family. There are fifteen elements that have an atomic number that varies in sequence from 57 to 71 which are all called rare earths. This batch of elements has incomplete filling and have a definition of f-block. These elements have an unstable condition when they are in solid form because of the seven electrons without a pair. Magnetism caused by the spinning of these elements is not matched even by ferrites which until the 1980s were supposed to be the kings as far as magnetism is concerned, and it is only after this period that rare earth varieties came into their own.


Ferrites are made up of ceramic and iron in parts. They are not as magnetic as the magnets rare earth. It is even at the best just one third of that given by their competitors, the rare earths. Ferrites are also very susceptible to losing their magnetism. Coercivity is a term that indicates the resistance to demagnetization and while such resistance by ferrites is pegged at 150, the coercivity for magnets rare earth can be be measured at 600 and can go up to 2000. So, theoretically it makes more sense to use rare earths for governments to run maglev bullet trains than to use ferrites. This would lead to higher resistance to demagnetization and would therefore serve the public in a much better fashion.

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