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Breakdown of the giant spin model in the 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 (2008) Breakdown of the giant spin model in the magnetic relaxation of the Mn-6 nanomagnets. PHYS REV LETT , 100 (15) , Article 157203. 10.1103/PhysRevLett.100.157203. Green open access

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Abstract

We study the spin dynamics in two variants of the high-anisotropy Mn-6 nanomagnet by inelastic neutron scattering, magnetic resonance spectroscopy and magnetometry. We show that a giant-spin picture is completely inadequate for these systems and that excited S multiplets play a key role in determining the effective energy barrier for the magnetization reversal. Moreover, we demonstrate the occurrence of tunneling processes involving pair of states having different total spin.

Type: Article
Title: Breakdown of the giant spin model in the magnetic relaxation of the Mn-6 nanomagnets
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.100.157203
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.100.157203
Language: English
Additional information: © 2008 The American Physical Society
Keywords: MOLECULES
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/126457
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