Molecular Engineering for Single-Chain-Magnet Behavior in a One-Dimensional Dysprosium–Nitronyl Nitroxide Compound

Authors

  • Lapo Bogani,

    1. Department of Chemistry and INSTM Research Unit, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy, Fax: (+39) 055-457-3372
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  • Claudio Sangregorio Dr.,

    1. Department of Chemistry and INSTM Research Unit, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy, Fax: (+39) 055-457-3372
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  • Roberta Sessoli Prof.,

    1. Department of Chemistry and INSTM Research Unit, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy, Fax: (+39) 055-457-3372
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  • Dante Gatteschi Prof.

    1. Department of Chemistry and INSTM Research Unit, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy, Fax: (+39) 055-457-3372
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  • This work was financially supported by the Human Potential Program RTN-QUEMOLNA (FP6-504880), the Italian MIUR (FIRB and PRIN projects), and the German DFG (SPP1137). We acknowledge Prof. A. Rettori, Dr. M. G. Pini, and Prof. C. Benelli for many stimulating discussions and Dr. P. Rosa for his assistance in ac magnetic measurements.

Abstract

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Single-chain magnets: A rational approach to decrease magnetic dipolar interactions led to the chain compound [Dy(hfac)3{NIT(C6H4OPh)}] (see structure; NIT(R): 2-(4′-R)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), the first rare-earth-radical-based single-chain magnet. The compound shows slow relaxation behavior, a dynamical crossover resulting from finite-size effects, and a very rich static magnetic behavior.

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