I've been aware of the Iron Nitride magnets supposedly developed by University of Minnesota for years. I've sent all kinds of requests in.. I'd love to get a sample.
I don't know if this is the same group or what, but I stumbled on a report regarding Lithium-Iron-Nitride magnets. Take a look here:
1.A. Jesche, R.W. McCallum, S. Thimmaiah, J.L. Jacobs, V. Taufour, A. Kreyssig, R.S. Houk, S.L. Bud’ko, P.C. Canfield. Giant magnetic anisotropy and tunnelling of the magnetization in Li2(Li1−xFex)N. Nature Communications, 2014; 5 DOI: 10.1038/ncomms4333
Or check out for the short version - https://www.sciencedaily.com/releases/2014/04/140428121439.htm
Someone.. Do this or tell me why we can't.