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Supramolecular Co(II)-[2 x 2] grids: Metamagnetic behavior in a single molecule | | O. Waldmann
; M. Ruben
; U. Ziener
; P. Müller
; J. M. Lehn
; | | Date: |
15 Jun 2006 | | Abstract: | 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. | | Source: | arXiv, cond-mat/0606422 | | Services: | Forum | Review | PDF | Favorites | |
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