title: Spin chirality in a molecular dysprosium triangle: the archetype of the noncollinear ising model.
abstract: Single crystal magnetic studies combined with a theoretical analysis show that cancellation of the magnetic moments in the trinuclear Dy3+ cluster [Dy{3}(mu{3}-OH)2L3Cl(H2O){5}]Cl{3}, resulting in a nonmagnetic ground doublet, originates from the noncollinearity of the single-ion easy axes of magnetization of the Dy3+ ions that lie in the plane of the triangle at 120 degrees one from each other. This gives rise to a peculiar chiral nature of the ground nonmagnetic doublet and to slow relaxation of the magnetization with abrupt accelerations at the crossings of the discrete energy levels.
authors.affiliation: Laboratory of Molecular Magnetism, Department of Chemistry and INSTM (UdR Firenze), Universitá degli Studi di Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy.
authors.forename: Javier
authors.initials: J
authors.lastname: Luzon
authors.forename: Kevin
authors.initials: K
authors.lastname: Bernot
authors.forename: Ian J
authors.initials: IJ
authors.lastname: Hewitt
authors.forename: Christopher E
authors.initials: CE
authors.lastname: Anson
authors.forename: Annie K
authors.initials: AK
authors.lastname: Powell
authors.forename: Roberta
authors.initials: R
authors.lastname: Sessoli