title: A Low-Symmetry Dysprosium Metallocene Single-Molecule Magnet with a High Anisotropy Barrier.
abstract: The single-molecule magnet (SMM) properties of the isocarbonyl-ligated dysprosium metallocene [Cp*2 Dy{μ-(OC)2 FeCp}]2 (1Dy ), which contains a rhombus-shaped Dy2 Fe2 core, are described. Combining a strong axial [Cp*](-) ligand field with a weak equatorial field consisting of the isocarbonyl ligands leads to an anisotropy barrier of 662 cm(-1) in zero applied field. The dominant thermal relaxation pathways in 1Dy involves at least the fourth-excited Kramers doublet, thus demonstrating that prominent SMM behavior can be observed for dysprosium in low-symmetry environments.
authors.affiliation: School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
authors.forename: Thomas
authors.initials: T
authors.lastname: Pugh
authors.affiliation: School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
authors.forename: Nicholas F
authors.initials: NF
authors.lastname: Chilton
authors.affiliation: School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.. Richard.Layfield@manchester.ac.uk.
authors.forename: Richard A
authors.identifier: 0000-0002-6020-0309
authors.initials: RA
authors.lastname: Layfield
keywords: cyclopentadienyl ligands; dysprosium; molecular magnetism; organometallics; rare-earth elements