Supramolecular Co(II)-[2 x 2] grids: Metamagnetic behavior in a single molecule

Details Supramolecular Co(II)-[2 x 2] grids: Metamagnetic behavior in a single molecule Supramolecular Co(II)-[2 x 2] grids: Metamagnetic behavior in a single molecule

2006-06-15

arxiv.org/abs/cond-mat/0606422v1

Inorg. Chem. 45, 6535 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

19 douple-spaced pages, 5 figures, to appear in Inorg. Chem

Scientific paper

The magnetic anisotropy of the supramolecular [2 x 2] grid [Co(II)4L4]8+, with a bis(bipyridyl)-pyrimidine based ligand L, was investigated by single-crystal magnetization measurements at low temperatures. The magnetization curves exhibit metamagnetic like behavior and are explained by the weak-exchange limit of a minimal spin Hamiltonian including Heisenberg exchange, easy-axis ligand fields, and the Zeeman term. It is also shown that the magnetic coupling strength can be varied by the substituent R1 in the 2-position on the central pyrimidine group of the ligand L.

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