Fig. 1
From: High temperature singlet-based magnetism from Hund’s rule correlations
Singlet ground state magnetism and the ligand cage of U(Bi/Sb)2. a, b The U(Sb/Bi)2 crystal structure is shown with spins indicating the antiferromagnetic structure in UBi2 (TN~180 K) and USb2 (TN~203 K). The uranium atoms have 9-fold ligand coordination with base (S1), middle (S2), and pinnacle (S3) ligand layers as labeled in a with respect to the central uranium atom. c, d In-plane ferromagnetic nucleation regions are circled in c doublet and d singlet ground state magnetic systems. The singlet crystal field ground state has no local moment, causing much of the lattice to have little or no magnetic polarization
