Abstract
Although the local crystal-field environment of the transition-metal ions in the two (2D) and three dimensional (3D) series of bimetallic oxalates are similar, those two classes of materials exhibit quite different magnetic properties. We use mean-field theory to evaluate the transition temperatures and
magnetizations of the 3D Fe(II)Fe(III) and Mn(II)Cr(III) bimetallic oxalates. Due to the tetrahedral coordination of the chiral anisotropy axis, the 3D bimetallic oxalates have lower transition temperatures than their 2D counterparts and much stronger anisotropy is required to achieve magnetic
compensation in the 3D Fe(II)Fe(III) compounds. Canting is predicted in both 3D compounds due to the spin-orbit coupling with the non-collinear orbital moments.
