Determination of the Magnetic Ground State of a Polycrystalline Compound Based on Susceptibility Measurements...

The diruthenium compound [Ru2(O2CMe)4]3[Cr(CN)6] contains two interpenetrating sublattices
that behave like giant antiferromagnetically-coupled moments with strong anisotropy. The preferred
orientations of the total moment of each sublattice are determined from susceptibility measurements
on a polycrystalline sample. In agreement with previous mean-field calculations for the magnetic
ground state, the fits to the experimental magnetization imply that the sublattice moments are
restricted to cubic diagonals rather than the cubic axis or the edge diagonals. The parameterization
of the sublattice susceptibility indicates that the sublattice spin states are more distorted when they
are aligned antiparallel.