1.
Phys Rev Lett
; 100(15): 157203, 2008 Apr 18.
Artigo
em Inglês
| MEDLINE
| ID: mdl-18518147
RESUMO
We study the spin dynamics in two variants of the high-anisotropy Mn6 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.