Tunable Dipolar Magnetism in High-Spin Molecular Clusters

Marco Evangelisti, Andrea Candini, Alberto Ghirri, Marco Affronte, G.W. Powell, Ian A. Gass, Peter A. Wood, Simon Parsons, Euan K. Brechin, David Collison, Sarah L. Heath

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Abstract

We report on the Fe17 high-spin molecular cluster and show that this system is an exemplification of nanostructured dipolar magnetism. Each Fe17 molecule, with spin S 35=2 and axial anisotropy as small as D = -0.02 K, is the magnetic unit that can be chemically arranged in different packing crystals while preserving both the spin ground state and anisotropy. For every configuration, molecular spins are correlated only by dipolar interactions. The ensuing interplay between dipolar energy and anisotropy gives rise to macroscopic behaviors ranging from superparamagnetism to long-range magnetic order at temperatures below 1 K.
Original languageEnglish
JournalPhysical Review Letters
Volume97
DOIs
Publication statusPublished - 20 Oct 2006

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    Evangelisti, M., Candini, A., Ghirri, A., Affronte, M., Powell, G. W., Gass, I. A., Wood, P. A., Parsons, S., Brechin, E. K., Collison, D., & Heath, S. L. (2006). Tunable Dipolar Magnetism in High-Spin Molecular Clusters. Physical Review Letters, 97. https://doi.org/10.1103/PhysRevLett.97.167202