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Exchange-Biasing in a Dinuclear Dysprosium(III) Single-Molecule Magnet with a Large Energy Barrier for Magnetisation Reversal
Authors:Dr. Tian Han  Dr. Marcus J. Giansiracusa  Zi-Han Li  Dr. You-Song Ding  Nicholas F. Chilton  Prof. Richard E. P. Winpenny  Prof. Yan-Zhen Zheng
Affiliation:1. 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;2. Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL UK;3. 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

Abstract:A dichlorido-bridged dinuclear dysprosium(III) single-molecule magnet [Dy2L2(μ-Cl)2(thf)2] has been made by using a diamine-bis(phenolate) ligand, H2L. Magnetic studies show an energy barrier for magnetisation reversal (Ueff) 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.
Keywords:dinuclear compounds  dysprosium  exchange interactions  hysteresis loop  single-molecule magnets
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