期刊
NATURE CHEMISTRY
卷 3, 期 7, 页码 538-542出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nchem.1063
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资金
- National Science Foundation [CHF-0617063, CHE-1010002]
- Direct For Mathematical & Physical Scien [1010002] Funding Source: National Science Foundation
- Division Of Chemistry [1010002] Funding Source: National Science Foundation
Single-molecule magnets approach the ultimate size limit for spin-based devices. These complexes can retain spin information over long periods of time at low temperature, suggesting possible applications in high-density information storage, quantum computing and spintronics. Notably, the success of most such applications hinges upon raising the inherent molecular spin-inversion barrier. Although recent advances have shown the viability of lanthanide-containing complexes in generating large barriers, weak or non-existent magnetic exchange coupling allows fast relaxation pathways that mitigate the full potential of these species. Here, we show that the diffuse spin of an N-2(3-) radical bridge can lead to exceptionally strong magnetic exchange in dinuclear Ln(II) (Ln = Gd, Dy) complexes. The Gd(III) congener exhibits the strongest magnetic coupling yet observed for that ion, while incorporation of the high-anisotropy Dy(III) ion gives rise to a molecule with a record magnetic blocking temperature of 8.3 K at a sweep rate of 0.08 T s(-1).
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