Tetrataenite Powerful Magnets Without Rare Earths
(www.youtube.com)https://www.youtube.com/watch?v=UXnwH70bRtAThis is a fun video with a twist at the end. Starts with how "rare earths" are not rare in the sense of low abundance, but rare in the sense of being difficult to extract from ore. He illustrates this with smelting copper, medieval style! But he brings the story bang up to date with a paper from 2022 about adding a bit of Phosphorus to a Nickel Iron mix to make Tetrataenite. Now that people know how to make Tetrataenite, it may be an alternative to Neodymium for magnets.
