title: Neutron-diffraction evidence for the ferrimagnetic ground state of a molecule-based magnet with weakly coupled sublattices.
abstract: The diruthenium compound [Ru(2)(O(2)CMe)(4)](3)[Cr(CN)(6)] contains two weakly coupled, ferrimagnetically ordered  sublattices occupying the same volume. Due to the weak, antiferromagnetic dipolar interaction K(c) ≈ 5 × 10(-3) meV between sublattices, a small magnetic field H(c) ∼ K(c)/μ(B) ≈ 800 Oe aligns the sublattice moments. Powder neutron-diffraction measurements on a deuterated sample confirm an earlier prediction that the sublattice moments are restricted by the anisotropy of the diruthenium 'paddle-wheels' to the cubic diagonals. Those measurements also suggest that quantum corrections to the ground state are significant.
authors.affiliation: Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6071, USA. fishmanrs@ornl.gov
authors.forename: Randy S
authors.initials: RS
authors.lastname: Fishman
authors.forename: Javier
authors.initials: J
authors.lastname: Campo
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Vos
authors.forename: Joel S
authors.initials: JS
authors.lastname: Miller