Exchange-Biasing in a Dinuclear Dysprosium(III) Single-Molecule Magnet with a Large Energy Barrier for Magnetisation Reversal

Tian Han; Marcus J Giansiracusa; Zi-Han Li; You-Song Ding; Nicholas F Chilton; Richard E P Winpenny; Yan-Zhen Zheng

doi:10.1002/chem.202000719

Exchange-Biasing in a Dinuclear Dysprosium(III) Single-Molecule Magnet with a Large Energy Barrier for Magnetisation Reversal

Chemistry. 2020 May 26;26(30):6773-6777. doi: 10.1002/chem.202000719. Epub 2020 May 12.

Authors

Tian Han¹, Marcus J Giansiracusa², Zi-Han Li¹, You-Song Ding^{1

2}, Nicholas F Chilton², Richard E P Winpenny², Yan-Zhen Zheng¹

Affiliations

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.

PMID: 32097529
DOI: 10.1002/chem.202000719

Abstract

A dichlorido-bridged dinuclear dysprosium(III) single-molecule magnet [Dy₂ L₂ (μ-Cl)₂ (thf)₂ ] has been made by using a diamine-bis(phenolate) ligand, H₂ L. Magnetic studies show an energy barrier for magnetisation reversal (U_eff ) 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.

Abstract

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