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Neutron spectroscopy and magnetic relaxation of the Mn-6 nanomagnets

Carretta, S; Guidi, T; Santini, P; Amoretti, G; Pieper, O; Lake, B; van Slageren, J; ... Brechin, EK; + view all (2009) Neutron spectroscopy and magnetic relaxation of the Mn-6 nanomagnets. In: POLYHEDRON. (pp. 1940 - 1944). PERGAMON-ELSEVIER SCIENCE LTD

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Abstract

Inelastic neutron scattering has been used to determine the microscopic Hamiltonian describing two high-spin variants of the high-anisotropy Mn-6 nanomagnet. The energy spectrum of both systems is characterized by the presence of several excited total-spin multiplets partially overlapping the S = 12 ground multiplet. This implies that the relaxation processes of these molecules are different from those occurring in prototype giant-spin nanomagnets. In particular, we show that both the height of the energy barrier and resonant tunnelling processes are greatly influenced by low-lying excited total-spin multiplets. (C) 2008 Elsevier Ltd. All rights reserved.

Type: Proceedings paper
Title: Neutron spectroscopy and magnetic relaxation of the Mn-6 nanomagnets
Event: 11th International Conference on Molecule-Based Magnets (ICMM 2008)
Location: Florence, ITALY
Dates: 2008-09-21 - 2008-09-24
DOI: 10.1016/j.poly.2008.11.009
Keywords: Molecular magnets, Neutron inelastic scattering, Dynamic properties, Magnetization reversal mechanisms, SINGLE-MOLECULE MAGNET, ANISOTROPY
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/86605
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