Magnetic Anisotropy of Dysprosium(III) in a Low-Symmetry Environment: A Theoretical and Experimental Investigation - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of the American Chemical Society Année : 2009

Magnetic Anisotropy of Dysprosium(III) in a Low-Symmetry Environment: A Theoretical and Experimental Investigation

Résumé

A mixed theoretical and experimental approach was used to determine the local magnetic anisotropy of the dysprosium(III) ion in a low-symmetry environment. The susceptibility tensor of the monomeric species having the formula [Dy(hfac)3(NIT-C6H4-OEt)2], which contains nitronyl nitroxide (NIT-R) radicals, was determined at various temperatures through angle-resolved magnetometry. These results are in agreement with ab initio calculations performed using the complete active space self-consistent field (CASSCF) method, validating the predictive power of this theoretical approach for complex systems containing rare-earth ions, even in low-symmetry environments. Susceptibility measurements performed with the applied field along the easy axis eventually permitted a detailed analysis of the temperature and field dependence of the magnetization, providing evidence that the Dy ion transmits an antiferromagnetic interaction between radicals but that the Dy-radical interaction is ferromagnetic.
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Dates et versions

hal-00492555 , version 1 (16-06-2010)

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Kevin Bernot, J. Luzon, Lapo Bogani, Mael Etienne, Claudio Sangregorio, et al.. Magnetic Anisotropy of Dysprosium(III) in a Low-Symmetry Environment: A Theoretical and Experimental Investigation. Journal of the American Chemical Society, 2009, 131 (15), pp.5573-5579. ⟨10.1021/ja8100038⟩. ⟨hal-00492555⟩
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