May 19, 2016

Rare-earth-free magnet made from cheap materials

Posted by in categories: entertainment, materials

A new cheaper way in creating magnets.

US researchers have created a powerful permanent magnet out of iron and nitrogen, two plentiful cheap materials, as part of a programme to cut the need for ‘rare earth’ metals.

It is only a tiny sample, a film 500nm thick, but it is the real thing.

“To the best of our knowledge, this could be the first experimental evidence of the existence of a giant saturation magnetisation, an obviously large coercivity, with a magnetic energy product of up to 20 MGOe, in a bulk-type FeN sample.” said the team in ‘Synthesis of Fe16 N2 compound free-standing foils with 20MGOe magnetic energy product by nitrogen ion-implantation’, a Nature Scientic Reports paper written by a team from the University of Minnesota, Los Alamos National Laboratory and Oak Ridge National Laboratory.

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