Abstract
Bimetallic oxalates are layered molecule-based magnets with either ferromagnetic or antiferromagnetic
interactions between transition metals M(II) and M'(III) on an open honeycomb lattice.
Some Fe(II)Fe(III) bimetallic oxalates exhibit magnetic compensation (MC) at a compensation temperature
Tcomp ≈ 30 K below the ferrimagnetic transition temperature Tc ≈ 45 K. To see if MC is
possible in other bimetallic oxalates, we construct a theoretical model for bimetallic oxalates that
exhibit antiferromagnetic interactions. By varying the M(II) and M'(III) average orbital angular
momentum, which can be controlled by the choice of interlayer cations, we have found regions of
MC in the families M(II)Mn(III) with M = Fe, Co, or Ni and V(II)M'(III) with M' = Cr or V but
not in the family M(II)Ru(III) with M = Fe or Cu.
