Abstract
A novel molecular assembly of cobalt-sulfite coordination polymer and melamine is synthesized under acidic conditions. Bar-shaped pink monocrystals as long as 1 mm are found to align along magnetic field lines at the proximity of a strong magnet.
Magnetometry shows no hysteresis at temperatures down to 2K, but magnetic anisotropy and antiferromagnetic coupling.
X-ray diffraction on a single crystal reveals that the cobalt-sulfite chains are along the shortest lattice vector or the crystal's long axis.
The crystal alignment along the magnetic flux can be attributed to single-ion anisotropy that results in longitudinal antiferromagnetic coupling along the chain.
Both structurally and magnetically isotropic crystals of metal-organic hybrid materials can be highly useful as elemental components in magneto-optics.
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