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Rare-Earth-Free Magnets With High Entropy Borides
['Maya Posch', 'Felix Domestica', 'Mark Topham']
Hackaday
Although most of us simultaneously accept the premise that magnets are quite literally everywhere and that few people know how they work, a major problem with magnets today is that they tend to rely on so-called rare-earth elements.
Although firmly in the top 5 of misnomers, these abundant elements are hard to mine and isolate, which means that finding alternatives to their use is much desired.
Fortunately the field of high entropy alloys (HEAs) offers hope here, with [Beeson] and colleagues recently demonstrating a rare-earth-free material that could be used for magnets.
Although many materials can be magnetic, to make a good magnet you need the material in question to be both magnetically anisotropic and posses a clear easy axis.
This basically means a material that has strong preferential magnetic directions, with the easy axis being the orientation which is the most energetically favorable.