具有用于磁化反转的大能量势垒的双核镝（III）单分子磁体中的交换偏置
Exchange-Biasing in a Dinuclear Dysprosium(III) Single-Molecule Magnet with a Large Energy Barrier for Magnetisation Reversal.
作者信息
Han Tian, Giansiracusa Marcus J, Li Zi-Han, Ding You-Song, Chilton Nicholas F, Winpenny Richard E P, Zheng Yan-Zhen
机构信息
School of Science, Frontier Institute of Science and Technology (FIST), Research institute of Xi'an Jiaotong University (Zhejiang), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of, Sustainable Energy and Materials Chemistry, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
出版信息
Chemistry. 2020 May 26;26(30):6773-6777. doi: 10.1002/chem.202000719. Epub 2020 May 12.
A dichlorido-bridged dinuclear dysprosium(III) single-molecule magnet [Dy L (μ-Cl) (thf) ] has been made by using a diamine-bis(phenolate) ligand, H L. Magnetic studies show an energy barrier for magnetisation reversal (U ) around 1000 K. An exchange-biasing effect is clearly seen in magnetic hysteresis with steps up to 3 K. Ab initio calculations exclude the possibility of a pure dipolar origin of this effect leading to the conclusion that super-exchange through the chloride bridging ligands is important.
通过使用二胺双（酚盐）配体H₂L制备了一种二氯桥联双核镝（III）单分子磁体[Dy₂L(μ-Cl)₂(thf)₂]。磁性研究表明，磁化反转的能垒（U）约为1000 K。在高达3 K的磁滞中清晰可见交换偏置效应。从头算计算排除了这种效应纯粹源于偶极作用的可能性，得出结论：通过氯桥联配体的超交换作用很重要。
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