Spin chirality in a molecular dysprosium triangle: the archetype of the noncollinear ising model.
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.
Luzon
Javier
J
Laboratory of Molecular Magnetism, Department of Chemistry and INSTM (UdR Firenze), Universitá degli Studi di Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy.
Bernot
Kevin
K
Hewitt
Ian J
IJ
Anson
Christopher E
CE
Powell
Annie K
AK
Sessoli
Roberta
R