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Long-range ferromagnetic dipolar ordering of high-spin molecular clusters

A. Morello·F. L. Mettes·F. Luis·J. F. Fernandez·J. Krzystek·G. Aromi·G. Christou·L. J. de Jongh
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Abstract

We report the first example of a transition to long-range magnetic order in a purely dipolarly interacting molecular magnet. For the magnetic cluster compound Mn6O4Br4(Et2dbm)6, the anisotropy experienced by the total spin S=12 of each cluster is so small that spin-lattice relaxation remains fast down to the lowest temperatures, thus enabling dipolar order to occur within experimental times at Tc = 0.16 K. In high magnetic fields, the relaxation rate becomes drastically reduced and the interplay between nuclear- and electron-spin lattice relaxation is revealed.

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A. Morello, F. L. Mettes, F. Luis, J. F. Fernandez, J. Krzystek, G. Aromi, G. Christou, L. J. de Jongh. 2002-12-16. Long-range ferromagnetic dipolar ordering of high-spin molecular clusters. https://doi.org/10.1103/physrevlett.90.017206

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