https://phys.org/news/2018-05-magnets-faster-d-metal-prototyping.html

"This was a known magnet material, but we wanted to revisit it to see if we could find exceptional magnetic properties," said CMI scientist Ryan Ott. "With four elements, there is a vast space of compositions to hunt around in. Using 3D printing greatly accelerates the search process."

A range of magnets was printed in two hours instead of producing them via conventional production methods, which can take weeks. The samples with the most promising properties were identified; a second set of samples were then made by conventional casting methods and compared to the originals, which confirmed the findings of the laser-printed samples.