Neutron spectroscopy has been used to observe transitions between the energy levels for the 21 different orientations of the S = 10 spin ground state of an octanuclear iron molecular cluster (Fe-8) exhibiting quantum tunneling of the magnetization. The results obtained on nondeuterated samples provide the first direct measurement of the zero-field splitting in a large cluster nanomagnet. A reliable and accurate determination of the composition of the cluster's spin wave functions and the spin-Hamiltonian parameters are deduced from the experimental observations, giving crucial information for the study of the macroscopic quantum tunneling process.

Neutron Spectroscopy for the Magnetic Anisotropy of Molecular Clusters / R. CACIUFFO; G. AMORETTI; R. SESSOLI; A. CANESCHI; D. GATTESCHI. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 81:(1998), pp. 4744-4744. [10.1103/PhysRevLett.81.4744]

Neutron Spectroscopy for the Magnetic Anisotropy of Molecular Clusters

SESSOLI, ROBERTA;CANESCHI, ANDREA;GATTESCHI, DANTE
1998

Abstract

Neutron spectroscopy has been used to observe transitions between the energy levels for the 21 different orientations of the S = 10 spin ground state of an octanuclear iron molecular cluster (Fe-8) exhibiting quantum tunneling of the magnetization. The results obtained on nondeuterated samples provide the first direct measurement of the zero-field splitting in a large cluster nanomagnet. A reliable and accurate determination of the composition of the cluster's spin wave functions and the spin-Hamiltonian parameters are deduced from the experimental observations, giving crucial information for the study of the macroscopic quantum tunneling process.
1998
81
4744
4744
R. CACIUFFO; G. AMORETTI; R. SESSOLI; A. CANESCHI; D. GATTESCHI
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/211834
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