Extended Data Fig. 2: Energy level diagram of the Co2+ 4F state.
From: Giant magnetocaloric effect in spin supersolid candidate Na2BaCo(PO4)2
Under the effects of octahedral crystal electric field and spin-orbit coupling, the lowest lying ground state is a j = 1/2 Kramers doublet separated from the first excited j = 3/2 level by a gap of about Δ ≈ 70 meV31.
