文章基本信息

标题：An NCN-pincer ligand dysprosium single-ion magnet showing magnetic relaxation via the second excited state
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作者：Yun-Nan Guo ; Liviu Ungur ; Garrett E. Granroth 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2014
卷号：4
DOI：10.1038/srep05471
出版社：Springer Nature
摘要：Single-molecule magnets are compounds that exhibit magnetic bistability purely of molecular origin. The control of anisotropy and suppression of quantum tunneling to obtain a comprehensive picture of the relaxation pathway manifold, is of utmost importance with the ultimate goal of slowing the relaxation dynamics within single-molecule magnets to facilitate their potential applications. Combined ab initio calculations and detailed magnetization dynamics studies reveal the unprecedented relaxation mediated via the second excited state within a new DyNCN system comprising a valence-localized carbon coordinated to a single dysprosium(III) ion. The essentially C_2v symmetry of the Dy^III ion results in a new relaxation mechanism, hitherto unknown for mononuclear Dy^III complexes, opening new perspectives for means of enhancing the anisotropy contribution to the spin-relaxation barrier.