That's impressive. Co₂MnTi could be very useful. Cobalt, magnesium, and titanium are all easily obtainable. 665C Curie temperature, which is above neodymium magnets (400C) but below samarium-cobalt (720-800C). Any drawbacks to this material? Hard to compound? Low coercivity? Hard to cast or machine?
"easily obtainable" is relative. For instance, Cobalt is actually less common in the Earth's crust than either of the two rare earths we most typically associate with magnets, Neodymium and Cerium. With Cobalt demand reaching unprecedented levels due to Lithium battery demand reaching unprecedented levels, this discovery in and of itself is not a simple economic win.
Also, Magnesium is 20-25 times more common than Manganese. Just as well- production of Magnesium metal is pretty small because it's so difficult to work with.
If they were able to predict the Curie temperature, I'd think they could predict the coercivity as well. However things like brittleness would probably fall outside of their domain.
