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A toroidal magnetic moment in the absence of conventional total magnetic moment is observed in a Dy (6) ring. The reason for the net toroidal arrangement of the local magnetic moments is the high symmetry of the complex in combination with strong intra-molecular dipolar interactions between Dy ions. The description of single-ion and inter-ion anisotropic magnetic interactions is achieved here for the first time fully ab initio, i. e. , without use of phenomenological parameters.
Ungur et al. (Tue,) studied this question.
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