Six new alter magnets, Ba₂FeMoO₆ was one of them.

Researchers have identified six new altermagnets, including Ba2FeMoO6 and Sr2FeWO6, through a novel machine-learning pipeline. This pipeline addresses a flaw in previous methods where DFT-relaxed structures with sub-0.1 Å distortions were misclassified. By training a gradient-boosted classifier on MAGNDATA and using amcheck for symmetry verification, the team confirmed these new materials. The discovery, which includes double perovskites, a layered cobaltite, a pyrochlore-derived molybdate, and oxyfluorides, highlights the importance of tolerance-aware re-symmetrization in altermagnet discovery.